Atheism is a religion
A religion is simply the answer to the “ultimate questions” in live: 1) where do we come from? 2) where are we ending?, and 3) how to behave to enrich this journey?.
Atheism answers these questions fair and square : 1) we come from matter and chance 2) the death is the end, and 3) don’t bother the others so they don’t bother you.
Atheism is a religion, a worldview.