Went to my friend's church yesterday I now regret it?

It was all going good, I joined in the singing, and bible reading and everything but after all that ended pretty much everyone turned hostile. I'm Buddhist. They wanted to convert me by saying Christianity is the only one true religion and all the other religions are man made, and that I'm wasting my time. They tried forcing me to get baptised and said I'll start speaking in tongues so that's my proof God exists. Well, I don't think they realise what Buddhism is really about. It's not a religion it's a way of life, same as Hinduism. I was highly offended when they started quoting some bible verses trying to "prove" every other religion is wrong and man made. My religion IS man made, not one Buddhist denies that, and I really don't see how that is a valid point. Anyway do all Christians believe in that? I have to admit Islam openly states that their religion only believes in one God, but when I went to their Mosque they were very friendly and didn't try to convert me at all. In fact they praised me for being there and invited me back to another event.