I was born and raised in a Christian household and was a Christian myself until a couple of years ago. Looking back I realize that if me now could meet me then, I don't think we'd get along. I admit that me then hated gays because they were "evil deviants who would destroy America" or some such bullshit. Since becoming an atheist, I have become way more relaxed and laid back than I was, say, five years ago. I will be honest, I am saddened by the fact that I ever held such ludicrous beliefs and all because I didn't think for myself and let some silly religion dictate my thoughts.
When I talk to Christians now, or peruse christian forums (which I do from time to time just to see what's going on), or have some kind of interaction with them, I realize that there are quite a few little things that just irritate my about Christianity. My biggest beef is the rampant hypocrisy. Christians love to talk about just having an "open mind" when trying to convert, but, in my opinion, there are very few groups of people in the world with less of an open mind than the majority of Christians.
So my question is this: what are the most irritating parts of Christianity to you? I realize that there are probably many things that irritate, but what's that one that just pisses you the hell off?