A few days ago I was debating a Christian theology student. He follows in the foodsteps of his father who's a priest.

It gets him his daily bread, then? :-)

He had to admit to me that he has no good argument for why he prefers Christianity is more true than Islam. He believed that everybody get's to heaven regardless of how he lives his life.

To some Christians, that is outright heresy. Does he have any arguments for why he prefers his Christianity to any other Christianities?

According to him there are a lot of people in his faculty who see things similarly. On the other hand those fellow students with spiritual experiences have racidally different views than him.

Do they all differ from him in the same way?