Atheism is a religion.

[Dystopia]

Yep, while we as atheists may some of us have certain core beliefs in common, they are never such as to constitute a religion. Some of us may have common attitudes toward evidence or the supernatural or cosmology or origins or evolution or any of another of other topics which often become bones of contention with theists. But what we think about any of these things will vary. No position on any other subject is guaranteed just by knowing someone is an atheist. We just don't have a belief in gods, and only some of us will claim to know gods do not exist.

The same should be true among theists, but since most religions as practiced seem to prescribe dogmatic shared beliefs, that isn't what we most often find. Of course theists who do not take the low road in this regard do exist. They're just rare.

Not even the attitude towards evidence and science, I know atheists who believe in zodiac signs and lack basic scientific knowledge, I know atheists who hate gays and gay marriage, it's really not that common, just more likely, but not a requirement, the only thing in common is lacking belief in gods or believing gods do not exist. I could even believe in spirits as an atheist, it would be legit