Mahdi is not the Antichrist, he will fight him

Mahdi or the 12th imam is not the Antichrist (Dajjal). According to Shia Muslim tradition, Mahdi will fight Dajjal - the anti-messiah, the anti-christ. This is a very big difference from what we are carefully led to believe, including by religious sources. Not to mention that both Shia and Sunni Muslims expect Jesus to come again, and pray everyday to be spared from the temptation of Dajjal anti-christ.