The article says the mahdi will reveal himself with Jesus at his side. From my reading and talking to muslims (I know many) they believe that the mahdi will return when there is chaos on earth i.e. world war. And yes acoording to them Jesus will be at his side to Break The Cross and bring all the Christians to Islam.
I laugh when they tell me this. And yes, I still have my head.
No oath matters to moslems because of al Taqiyya and Kitman.