Allow me an attempt at analogism here, I will repeat your 2nd sentence in the context of another hotly debated topic. Hopefully it clarifies where I lack clarity:
"Humans. Chimpanzee. Silverback. The ancient Homo erectus and neanderthal. All fall into the bucket of primates,
but none are primates. And they are all separate and discrete species."
I suppose I can't fathom how or why anyone would supposedly hold the belief of a God or gods without a network of beliefs that collaborate in corroborating one another (at least in their mind). I must ask, 'Did/does the deity do anything or have any purpose? Nothing, ever?' I understand a belief need not evidence, reason, nor logic...
For that matter, it seems odd to believe that any of our beliefs are a monolith standing unsupported... "All alone, by itself, against the naysayers, a lone pillar of hope in an ocean of doubt! Believing!"