Seriously

[Aoi Magi]

When you want to talk about god, you would first need to define 'god', and depending on that definition you can verify the claims presented and either accept or reject it. Atheism isn't a positive or negative position by itself, however it does take positive or negative stance based of particular claims.

So if I claim that I believe the Sun to be a god, and I don't claim any supernatural attributes to it. Then it isn't something you can't really disagree with, unless I clarify my criterion for the word 'god'.

But in a general sense, 'god' generally refers to the abrahamic or biblical god, and due to the huge amount of misinformation, contradictions, and verifiable false informations, some atheists would reject that particular god without much consideration.