Here's my problem:

If Christians are right, then the Buddhists and the Jews are wrong. If Hindus are right, then the Muslims and the Christians are wrong. etc. etc. As if god, truth, whatever, could be confined to this or that sect, group, tribe, etc.

Another way of putting it: if Christianity is the one and only truth, then Ghandi, Nietzsche, and the Buddha all went to hell, and Jimmy Swaggart will go to heaven. So in short, I'm not impressed.