First: Atheism is not a ‘Fact.’ Atheism does not make any claims.
Second: Religion confirms very, very, little and that is why there are atheists.
Third: Atheism does not prove anything. ‘Prove’ is a mathematics’ term best used in the paradigm of math for math problems. Perhaps you are asserting that Atheism provided evidence for the mythical status of religion. This may or may not be true. The term atheist is defined by the religios and not by the atheists. All non-believers are atheists. That is the meaning of the word atheist. A person that does not believe according to the Church, is an atheist. That qualifies new born babies, those people born in sin, as atheists. They do not have to think anything about religion to be an atheist. Ergo; your assertion that athiesm asserts the mythical nature of religion is demonstrably wrong.
Atheists are people who do not believe in gods. That’s it. End of story. I don’t have a clue what you are on about.