As long as you don't force your religion ( or any belief for that matter) onto others, I don't give a **** what you believe in.
It's when you take actions based on certain beliefs or force your belief onto others that gets me annoyed.
^that's my super srs opinion on it
I do get mad at things that seem retarded to me, though. Like saying "religion is stupid"; it's just a simple statement about a complex topic that has no explanation behind it and when someone doesn't explain, it irritates me. Not really worth pointing out / getting mad about, though.