What is your strongest reason for believing atheism is true?

[Psykhronic]

Nineteen - is theism a religion?

I'll give you a hint - no, it is not. There are theistic religions just as there are atheistic religions. Someone calling themselves a 'theist' is not specifying a religion just as someone calling themselves an atheist. Theism and atheism are descriptive of the claim of god, not any doctrine surrounding them.