Except that saying you are "pretty certain there is no god" isn't a fact. It's your sincerely-thought-out belief system.

"Atheism exists" means exactly that...atheism is a belief system speculating on the mysteries of cosmology. There's no hard evidence that "proves" atheism (as fact) beyond a reasonable doubt.

By what metric are you defining "intelligence" or "education"? Because, unless you define that metric, it sounds as though you are attempting to gaslight anybody who believes in any form of creationism or agnosticism.

The correlation between stronger public welfare systems in less theistic nations versus weaker public welfare systems in more theistic nations could just as easily be attributed to the tendency of capitalistic systems to be exploited by Christian/monotheistic supremacists.