There are a lot of discussion on Juedo-Christian prophecy which ones mean what, somes are right, some maybe not, some are a load of crock.
My point is---- this is what the Muslims believe. They don't care what we believe, to them it's what they believe that counts.
As far as their prophecies go they will try to make it happen, this is why terrorist are doing what they are doing they see themself as preparing the way for the Mahdi.
It already happened in the past during the 1800's i believe, where someone claimed he was the Mahdi and a lot Muslims followed him and started a war.
The possibity is all too real that someone claiming to be the Mahdi will step up, unite the Muslims and start a world war.