So, you seem to have only met a certain kind of atheist. I don't really want to say more about that in particular because it feels like I will be accused of proselytizing. What I will say is that I think you're reading too much into what not believing in deities may or may imply about someone.

Edit: I should also ask, from your edit, what do you mean by "deity" and "universe" when you say that atheism holds that the universe is a deity?