I suspect that everyone would be much better off if we all referred to the blind guesses we make about reality as...BLIND GUESSES, rather than "beliefs."
Some people blindly guess there is at least one god...and make other blind guesses about the nature of that god...about what pleases it and what offends it.
Other people blindly guess there are no gods.
You hear both sides assert their blind guesses as, "I 'believe in God' and blah, blah, blah (about its nature."...
...or "I believe there are no gods." Some of the later use, "I do not 'believe in' God", but actually seem to be saying, "I believe there are no gods."
Nothing wrong with guessing either way. One is almost certainly correct...either there is at least one god or there are none.
But why not just characterize the blind guess as a blind guess...rather than disguising it as a "belief?"
Why not?