How do you become an Atheist?

[Anomalocaris]

For some unfathomable reason, the religious seem to think they are exempt from that requirement.

It's easily fathomable. They fear even the threat of contradiction.

I don't.

Yes you do, otherwise you would provide an answer and offer it for scrutiny:

You haven't got the first clue as to what god even is. You have no business asking such a question.

To who?

To the person asking the question.