I think Atheism a religion, they fellowship together, base their eternal destiny on it, must have faith that there is no God (or else they would be agnostics), produce literature trying to support their position, and point out the supposed flaws in the other religions.
Whether you think atheism a religion or not really doesn't change the fact that it isn't.
And please, please, PLEASE learn the distinction between atheism and agnosticism. Until you do you will continue to be lambasted for your naive, predictable and bordering-on-irrelevant notions.