These are some of the questions I am curious about. What makes you think atheism is true? What evidence-reason do you have for it?
Atheism is neither true nor false. It is a position on the existence of god(s). There are no claims in atheism. There is nothing to be deemed true or false.
I assume you are actually asking whether there is a god, but that has nothing to do with atheism. Atheists don’t claim there is no god. Our position is that there is no evidence of god(s), and that can’t be denied.