Terry Eagleton argues vaguely for a vague type of Christianity, he's even vague about whether or not he is a Christian. Eagleton is also an admirer of Karl Marx. It's not quite clear how Eagleton reconciles his vague support of Christianity with the traditional Marxist view that religion is the Opium of the people. Despite this there is a school of thought that reconciles part of Marxism with Christianity, it's known as Liberation theology. It seems Eagleton has some contact with liberation theology or with similar schools of thought.