Things that piss me off about atheists:
The fact that some of them think it makes them smarter or more "intellectual" than believers for whatever reason I don't know.
When they wear CROSSES.
When they celebrate Christmas and Easter and other CHRISTIAN holidays. They claim to not believe in God but they want food and presents.
*I'm not intending to insult those of other faiths, however, it is offensive to me when people insult my faith.
Thats all, really...