The Mahdi and the Antichrist
Islamic Antichrist theorists compare the Islamic Mahdi to the biblical Antichrist.  They basically believe when the Antichrist shows up, he will claim to be the Mahdi of Islamic traditions. Joel Richardson offers a list of similarities between the Mahdi and the Antichrist in his book, and just like in the case of the Isa/False Prophet comparisons, I will take each supposed similarity one by one .
A Powerful Political and Military World Leader
Richardson points out that both the Mahdi and the Antichrist are said to be powerful political and military world leaders. This is true, but it should be noted that this is a very general statement that can be applied to just about everyone we have discussed in this section of the book. For example, the Islamic Isa certainly could be described as a powerful political and military world leader, even more powerful than the Mahdi. In addition, the Last Roman Emperor from the Christian pseudopigraphical material could also be described as a powerful political and military world leader.
As we have already discussed, the concept of the Mahdi is almost certainly based on the Last Roman Emperor idea in Christian tradition. The pattern that will develop as we go over this list of similarities is Richardson will describe commonalities that are much more applicable to the Mahdi and the Last Roman Emperor than to the Mahdi and the Antichrist. We will also see that differences between the Mahdi and the Antichrist are the same as the differences between the Last Roman Emperor and the Antichrist. This is why the majority of Richardson’s similarities must by necessity be extremely general.
For example, in this case, though the Mahdi and the Last Roman Emperor are powerful political and military leaders, they differ from the Antichrist in that they both die, allowing Jesus/Isa to rule the world after their very short reign. This is certainly not the case with the Antichrist and the False Prophet. The fact that Isa, not the Mahdi, is the one who restores the world to a state in which the lambs and wolves graze together and the vipers no longer bite people is a testament to the primacy of Isa over the Mahdi in the Islamic system. My point is that the general comparisons made by Richardson could be very specific comparisons if he were equating the Mahdi to the correct counterpart (i.e. the last Roman Emperor), who is a political and military world leader who rules the world before Jesus takes his throne. However, since Richardson is determined to equate the Mahdi with the Antichrist, he must minimize the importance of Isa as the final ruler in Islamic tradition.
The Mahdi as a Spiritual World Leader
Richardson’s next point is that the Mahdi and the Antichrist are both said to be spiritual world leaders. Again this is true in a general sense, but this has the same problem with the previous point that this general statement is actually truer of Isa and the Last Roman Emperor. In the case of Isa, he is the one who actually converts the world to Islam and judges the world in accordance with Islamic law. It is only after the Mahdi dies and Isa begins his rule that the universal peace and justice based on Islamic law begins. The Mahdi should be considered more of a forerunner, preparing the way for Isa’s new world.
The actual type of “spiritual world leader” the Mahdi is said to be is much more like the spiritual world leader the Last Roman Emperor is said to be. That is, they both come at a time when the world has lost faith, they both fight limited wars with the nations that oppose their religion to restore orthodox religion, they both set up a limited peace based on their religion, and this peace lasts until the Antichrist/Dajjal arrives, in which case they both look to Isa/Jesus for help.
The Mahdi Kills Jews and Christians
Next Richardson says that both the Mahdi and the Antichrist kill Jews and Christians and, therefore, should be equated with one another. There are several problems with this comparison. The first is that, while it is true that the Mahdi does kill Jews and Christians during his wars, he begins his military campaign against the Sufyani , a Muslim leader from Syria. The Mahdi also conquers many other Islamic countries, including parts of Iraq and Saudi Arabia. The Mahdi is even said to team up with the Christians at one point to fight their common Arab enemies; the Christians and Muslims even conquer Constantinople together. However this Christian/Islamic coalition ends when the Christians claim the victory was due to Christ and the Muslim armies claim it was due to Allah.
There is no systematic killing of Christians whatsoever by the Mahdi, certainly not in the way the Antichrist is said to do. The systematic killing on religious grounds will only happen after Isa arrives to judge the world by Islamic law. So here again we have the same problem. Richardson’s supposed similarities with the Mahdi and the Antichrist are truer of Isa than the Mahdi.
The actual type of killing of Jews and Christians done by the Mahdi is the same type of killing the Last Roman Emperor is said to do. The Last Roman Emperor is said to fight wars with those who oppose him and his religion. His killing of people is all military in nature. There is no hint of executing civilians because of their religion, but rather he is pictured as subduing the nations that oppose him. Those who die, die in battle with the Mahdi’s armies, just like the Last Roman Emperor.
The Mahdi Conquers and Rules From Jerusalem
Richardson says that both the Antichrist and the Mahdi conquer and rule from Jerusalem. This initial statement is only half true. In the hadiths, Jerusalem seems to be conquered before the Mahdi arrives, and the people who fight there are Arabs.
“Then, another black banner (army battalion) will come from Khorasan. Their turbans are black and their clothes are white. At their front end will be a man named Shuayb bin Salih, from Tamim (tribe). They will defeat supporters of the Sufyani [a Muslim leader] (and proceed further) until he (Shuayb bin Salih) arrives to Jerusalem (where) he will lay the foundation for the Mahdi’s (future) dominion. He will be supplied with three hundred (men) from AshSham (Syria). From the time, he comes out (from Khorasan) until he hands over the matter (rule) to the Mahdi, there will be seventy two months (six years).’”  (Nuaim Ibn Hammad's Kitab Al-Fitan )
I cannot find many hadiths that state specifically the Mahdi will actually rule his Caliphate from Jerusalem; but, as in the case of the hadith above, there is enough to at least suggest that he does. Unlike the Antichrist, however, there is certainly nothing in the hadiths that describe the Mahdi setting up the temple or allowing Jewish people to start the daily sacrifices again (Daniel 9:27), let alone sitting in the Jewish temple and declaring himself to be God. So I would again submit that the part of the similarity that is true is a general statement that better applies to Islamic Isa, who, without question, is said in the hadiths to rule from Jerusalem.
There are two probable reasons why the hadith writers felt compelled to incorporate Jerusalem into their eschatology. First, the Bible is clear that Jerusalem is where the kingdom age will take place. Even though Islamic writers obviously had no problem with making certain editorial changes of biblical stories, the centrality of Jerusalem in the last days was too significant to tamper with. The last battle with the Dajjal is, therefore, said to be in Jerusalem and Isa is said to rule the world from Jerusalem, just like in the Bible. The hadith writers’ dependence on the Bible for the basic framework of their eschatology forced them to make Jerusalem the center of the last days despite their probable preference for making it Mecca or Medina. This is the first reason that Jerusalem was included, though I would argue the majority of Islamic texts that mention the city apply to Isa, not the Mahdi.
The only reason the Mahdi has any relationship to Jerusalem at all is probably related to the Last Roman Emperor. It should not be overlooked that both the Mahdi and the Last Roman Emperor are said to travel from Constantinople to Jerusalem after hearing of the Antichrist’s appearance. This very specific similarity should be enough to show that the Mahdi is being patterned after the apocalyptic writings regarding the Last Roman Emperor, which explains the mention of Jerusalem in relationship to the Mahdi, since Jerusalem is where both men give up their rule to Jesus/Isa.
The Seven-Year Peace Agreement
This is the first of the similarities Richardson suggests that does not have the problem of being too general; in fact, it’s quite specific. He quotes a hadith that says the Mahdi will make a seven-year treaty with the Romans. And since he also believes that Daniel 9:27 is speaking of the Antichrist making a seven-year treaty with the Jews, he says they must be a reference to the same thing. I will quote the hadith in question below:
“The Prophet said: There will be four peace agreements between you and the Romans. The fourth will be mediated through a person who will be from the progeny of Hadrat Aaron [Honorable Aaron—the brother of Moses] and will be upheld for seven years. The people asked, ‘O Prophet Muhammad, who will be the imam [leader] of the people at that time?’ The Prophet said: ‘He will be from my progeny and will be exactly forty years of age. His face will shine like a star.’” [70]
The first problem is this hadith is almost certainly referring to an event other hadiths talk about at great length, namely the treaty that unites the Roman armies and the armies of the Mahdi to fight against their common enemies. As previously noted, this treaty ends because of a disagreement between the soldiers about which God has been responsible for their victories. Note that in the following hadith the treaty is said to be for ten years, not seven.
“You will enter into a reconciliation treaty with them [the Romans] for 10 years. You and the Romans will invade an enemy behind Constantinople. When you return for that invasion, you will see Constantinople... Then, together, you will invade Al-Kufa (a Shia city in Iraq) ... Then, you and the Romans together will invade some of the people of the East. You will capture women, children and money (possessions and wealth) The Romans will tell you: Give us our share of the children and women. The Muslims will say: No, we cannot based on our religion, but take from the rest of things (meaning from the possessions, etc). The Romans say: We will not take except from every thing. The Romans say: You won (the battle against the common enemies) because of us and our Cross. The Muslims will say: No, Allah granted victory and support to its religion. So, they will raise the Cross. Muslims become angry. A (Muslim) man will jump on to the Cross and break it. The Romans will leave angry and when you reach their king, they will tell him: The Arabs deceived us and withheld from us what we are entitled to and they broke our Cross and killed some of us. Their king becomes very angry and amasses a large army and reconcile with other nations. They will marsh against the Muslims.” [71]
Though the timing of the Roman treaties is very hard to pin down due to multiple contradictory accounts, it seems likely that some hadith writers wrote seven years as opposed to ten years because of the time between the Constantinople battle and the Dajjal, which is occasionally said to be seven years.
“Abdullah bin Busr reports that the Prophet said: ‘Between the Malhama (the final War or Battle) and the conquest of the City (i.e. Constantinople), there will be six years, and the Dajjal (Antichrist) shall appear in the seventh year’”
To further illustrate the unreliability of these hadiths , especially concerning the amount of years involved, the “seven years” in the above hadith about the length of time between the conquest of Constantinople and the Dajjal is sometimes referred to as being “seven months.”
“Al-Malhama Al-Kubra conquest of Constantinople, and the coming of Dajjal (Antichrist) will be (occur) within (a period of) seven months.” (Abu Dawud and Ibn Maja)
Richardson wants to equate this seven-year treaty with the Romans to the Antichrist “making a covenant” in Daniel 9:27. He suggests that the treaty the Mahdi makes with the Romans would allow the Jews to rebuild the temple, but it seems clear what Muslims believe this treaty is about and it has nothing to do with the Jewish temple. It is a military alliance with Romans to help the Muslims destroy various enemies. The treaty is broken when the soldiers get in a fight about religion.
As alluded to earlier, there is also a problem with the number of years mentioned in the hadith quoted by Richardson. The treaty with the Romans is almost always referred to in other hadiths as being ten years long, not seven. As far as I know, the only hadith that says it will be seven years is the one Richardson quotes. Hadiths are notorious for having contradictory statements, especially when it comes to numbers, but to choose the hadith with the number that best suits your theory, in light of it being the only hadith on the subject containing that number, is not good.
The Treaty is Not With the Jews
Another problem with this theory is that this treaty in the hadith that Richardson quotes does not include the Jews at all! It is true that a Jew from the tribe of Aaron mediates the treaty, but the treaty itself is actually between the Romans and the Muslims. So when Richardson says this treaty will have something to do with the temple being rebuilt in Jerusalem, I have to ask why? The Jews are not entering into any kind of agreement, with the Muslims, Romans, or anyone else in this hadith ; they are simply acting as a middleman between the Muslims and the Christians.
Rethinking the “Peace Treaty”
Finally I submit that this entire issue may be moot since it may not even be a “peace treaty” that the Antichrist makes. The actual words used in Daniel 9:27 are “make firm a covenant”; and while a covenant can mean a contract or perhaps treaty, it certainly can be a reference to an actual covenant in the biblical sense of the word, as well. Again my self-imposed limitations prevent me from detailing my personal thoughts about this here, but I will include a discussion about the covenant made by the Antichrist in Appendix 5 .
Richardson’s White Horse Misquotation
The last comparison Richardson makes is actually very deceptive, that is, if he knew beforehand what he was doing. However, I will give him the benefit of the doubt and chalk this up to an honest mistake on his part.
Richardson says an influential Islamic scholar in the Middle Ages believed the Mahdi is in view in Revelation 6:1–2 in which a rider on a white horse, typically understood to be the Antichrist, is seen. I will quote Richardson directly on this point:  
“For in seeing the Antichrist on the white horse with a crown and conquering, Muslim scholars see a clear picture of the Mahdi. As mentioned in the earlier chapter on the Mahdi, the early Muslim transmitter of hadiths, Ka’b al Ahbar is quoted as saying:
“I find the Mahdi recorded in the books of the Prophets… For instance, the Book of Revelation says: ‘And I saw and behold a white horse. He that sat on him…went forth conquering and to conquer.’” [72]
When I first read this I was skeptical for several reasons. The first reason was because there is absolutely nothing that says the Mahdi rides on a white horse in any hadith or Quran verse that I have found. The second reason is that the person he is supposedly quoting, “Ka’b al Ahbar,” wrote at a time when the concept of the Mahdi was not very well developed, certainly nothing like it is today. I found it very unlikely that he would say such a thing, so I went about trying to track down this quote.
What I found is a quote from a book by two Egyptian writers, Muhammad ibn Izzat and Muhammad Arif, in their book Al-Mahd i , published in 1997. The actual quote reads like this:
“Ka‘b al-Ahbar said: “I find the Mahdi recorded in the books of the Prophets. There will be no injustice or oppression in his rule.” [This is when the actual quote from Ka‘b al-Ahbar stops (Note the quotation marks). The rest of this paragraph is commentary from the authors of this book] For instance the Book of Revelation says: ‘And I saw and behold a white horse. He that sat on him ... went forth conquering and to conquer.’ It is clear that this man is the Mahdi who will ride a white horse and judge by the Qur’an (with justice) and with whom will be men with the marks of prostration on their foreheads.” [73]  
Richardson took out the last part of the actual quote from al-Ahbar which said “There will be no injustice or oppression in his rule” and added in its place a quote from the authors of this book: “For instance, the Book of Revelation says: ‘And I saw and behold a white horse. He that sat on him…went forth conquering and to conquer.’” Therefore, he is telling his readers a prominent Islamic scholar believes this when, in fact, this is the belief of two Egyptian men in 1997 who, in other places in their book, show that they have rather unorthodox views about the end times.
If you look up the idea of the Mahdi riding a white horse, you will not find the idea in the hadiths or the Quran. Instead, you will find Christians citing Joel Richardson who attributes the words of a recent book to the Middle Ages Islamic scholar Ka‘b al-Ahbar.