Is it normal for atheists to always act so conceited?

I am an atheist, and I can safely say; not all atheists arw like that. In fact, most of us think the exact same thing about Christians. Now, I, specifically, am pretty concieted, but that definitely has nothing to do with my religious views. I'm just like that. And I only get like that about my religion when someone from another religion is acting that way and badmouthing me. Only then do I find it acceptable to be a b*tch about religion. Like if someone starts preaching to me about god, I will most definitely preach to them about Scoence.