Religion

It seems to me that Athiesm is simply an unwillingness to believe in extraordinary and fantastic claims without proof.

Quantum mechanics has extraordinary and fantastic claims but it also offers scientific proof for those claims so we are open to believing it.

No one has offered any kind of proof of an old man with the white beard sitting on a cloud ruling the universe so atheists will not believe it. If,in some hypothetical world, this could be proven to be true scientifically, an atheist also would be open to believing it.

No has any proof of a conscious existence after death either.

I think atheists would be open to accepting these claims if there was verifiable proof that it was true. (A book written by men thousands of years ago is not verifiable proof.)

So atheistic belief is not simply a disbelief in Gods. It's a disbelief in extraordinary and fantastic claims made without and evidence that it is true.