A rational mind could see this clear as say.

Religions are certainly used for control and division, but just as certainly that is not their only function.

Jung said somewhere that if person can believe in god, they will live a better life if they do.

For ppl who don't believe in god, the most rational stance is agnosticism - unless they can prove god does not exist. Fervently arguing that god does not exist while not being able to prove it is ironic.