embracedbias wrote:It correlates with other beliefs, but it isn't a belief system. Atheism is simply a lable for a lack of a particular belief. There is no doctrine. No ritual. It's not a religion.
Well, there is a doctrine ... as you yourself noted. You cannot believe in God. I'd also argue that stating "There is no God" is just as profound a theological statement as saying "There is a God," but that's a far more philosophic discussion.
This, however, is sidestepping the point. You argued that associating atheism with other beliefs is "stupid." Well, historically speaking, atheism associates pretty strongly with rationalism, empiricism, etc. More broadly, the decline of religion tracked with the birth of nationalism, and other more state-centered ideologies in the early modern period.