:salamext:
Al Mahdi comes first, and i think the scholars say that Al-Dajjaal is the first of the Major signs, and he will come after Al Mahdi. Al Mahdi and the muslims won't be able to kill him, and one day when they are performing salaah - Eesa ibn Maryam (alaihim Salaam) will come and he will kill Al-Dajjaal. And Allaah knows best.
Will the dajjal be from Israel?