Atheism is a matter of ontology/metaphysics and not science. Science, too, is a matter of ontology, in that it says that there are electrons and they have such

Atheism is a matter of ontology/metaphysics and not science. Science, too, is a matter of ontology, in that it says that there are electrons and they have such and such properties. But atheism, while accepting the results of science (what science says there is), it goes a bit further. And the keyword in understanding how and why and where does atheism goes further is the word 'evidence'. Many times you'll here people saying "There is no evidence!" for that or that matter. However, in understanding what kind of evidence do we expect to see (etymologically, evidence holds the reference to what is seen), we need to have a clear idea of what is there to be seen. Atheism expects and denies that there is evidence of a God. A super-natural being, a person, conscious, free, and able to do whatever they may wish to do. And this is where atheism CAN NOT apply any of the methods available in science. Science has been able to understand nature (its laws and ontology) because what happens in nature, happens in virtue of law. That is, all the time. Repeatedly. Experimentally verifiable. The actions of a person are not like that. Be it a God, a bird, a fish or a bug. The intentional behavior of a conscious being can not fall under the umbrella of exact, objective science. Unless there is some sort of determination which resembles a (statistical) law. Which, by definition, it's not the case for God. So, yes, atheism and religions are not scientific. Which is not to say they may not be true. One of them all.