regarding the coming of the Mahdi - [link to www.answering-islam.org]
A brief summary of the page is below, people who have studied the biblical description of the antichrist will notice striking resemblances.
1. The Mahdi is Islams primary messiah figure.
2. He will be a descendant of Muhammad and will bear Muhammads name (Muhammad bin Abdullah).
3. He will be a very devout Muslim.
4. He will be an unparalleled spiritual, political and military world leader.
5. He will emerge after a period of great turmoil and suffering upon the earth.
6. He will establish justice and righteousness throughout the world and eradicate tyranny and oppression.
7. He will be the Caliph and Imam (vice-regent and leader) of Muslims worldwide
8. He will lead a world revolution and establish a new world order.
9. He will lead military action against all those who oppose him.
10. He will invade many countries.
11. He will make a seven year peace treaty with a Jew of priestly lineage.
12. He will conquer Israel for Islam and lead the faithful Muslims in a final slaughter/battle against Jews.
13. He will establish the new Islamic world headquarters from Jerusalem.
14. He will rule for seven years (possibly as much as eight or nine).
15. He will cause Islam to be the only religion practiced on the earth.
16. He will appear riding a white horse (possibly symbolic).
17. He will discover some previously undiscovered biblical manuscripts that he will use to argue with the Jews and cause some Jews to convert to Islam.
Mahdi and David.......arrive to save Islam
Sounds like a description of the ANTICHRIST!