Atheism is a form of religion...

[Mudhammam]

I wouldn't consider an atheist church--or any other community for that matter--religious, unless its adherents began venerating certain figures; if the speech of the so-called leaders, intended to simply inspire and clarify, credulously became authorized as infallible and pseudo-divine, followed by written and oral traditions repeated and passed down generation after generation without ongoing critical analysis, and a high majority of the quasi-membership continually failing to execute inquisitive, open-minded research into the reason and evidence for the factual basis of all claims... then yeah, it's a religion, and it's basically nationalism.