My point was that any self-identified atheist has taken a philosophical stance regarding the existence of gods be that 'no gods exist', 'there is no evidence that gods do exist', etc.
Irrelevant. As long as none of those stances are “I believe a god exists,” the person lacks belief in a god.
NOBODY is saying that atheists necessarily have no beliefs ABOUT gods. The point is that the defining characteristic of an atheist is that whatever beliefs they hold about gods or anything else, none of those beliefs are beliefs in any gods.
It’s very possible that an atheist could, say, reject the existence of Thor or Jehovah, just as they could also, say, believe that the Earth is round and the Red Sox are the best baseball team in the world... but none of this is relevant. This is that part you seem to have a mental block about.
It may very well be that we can’t hear about a baseball team without mentally ranking them relative to all the other teams we know; it may be cognitively impossible for an atheist - or anyone else - not to have a favourite baseball team. Still, it would be ridiculous to demand that an atheist defend why his favourite team is “the best,” because it has nothing to do with whether a person is an atheist.
Same with opinions ABOUT gods. The question of how a person regards a god he doesn’t believe in has nothing to do with the only characteristic that matters when deciding whether a person is an atheist:
how many gods do they accept as existing? If the answer is one or more, they’re some sort of theist; otherwise, they’re an atheist. That’s it.