I'm not going to doxx myself by telling you the name of that church, but it's low-church. Meaning that it has nothing to do with other churches in the denomination (unlike high Church like Roman Catholic or the Church of England where it's one big institution)

Ah, so you're in a Christianity-derived cult. The unhinged zealotry makes more sense now.

Athiesm is a new concept

No, atheism is the default condition of human beings before anyone indoctrinates them.

since most of the world is religious, people emerge with athiesm

Other way around. Literally every single human on earth is born an atheist and then 99.99% of the people who become religious do so because others told them they had to.

And a lot of athiests grow up in a lukewarm religious environment anyway.

Maybe because it's easier to escape a cult that's less intense about the threats of eternal hellfire and shunning from society? Just a thought.