I think it's things like how a long time ago when people didn't understand what lightning was or where it came from they just guessed and said it was some guy in the sky that's throwing it on the earth. Now a days anyone who believed in that would be laughed at and considered silly. Mainly because we have a vast understanding of what lightning is, where it comes from, why it strikes the earth, etc..
Religions saving grace would be lower education and higher dropout rates. The more someone knows about science and logic the sillier religion seems.
well, currently I live in an area where roughly 95% [from a guess] believe in the bible and in god. And my upbringing was one as a mixed kid [who's family wasn't extra traditional about our heritage and culture or silly things like being "black and proud" ew....]. So, we weren't very cultural really. We were taught about cultures, but weren't really taught to embrace any said culture. We were, however raised to believe in the bible and went to church.
But even then whenever a church seemed to do something shady we left. e.g. One preached about how women have to be submissive all the time to the man. And how we don't love god if we don't give money to the church. My parents basically say "No, fuck that." And left.
Anyway, what's with all the demographic and cultural questions?
Personally I think poor people are usually less educated than well off people and rich people.
I also think the less one understands about science and logic the more likely they are to believe in imaginary beings like those heard of in religions.
Though education doesn't determine ones overall intelligence it does give them knowledge about many things they'd never have the time or resources to figure out on their own, like logic and science.
And since rich people have better access to education and knowledge they are less likely to believe in silly things like men throwing lightning bolts from the sky. While poor people are more likely to believe the imaginary stories since they are less likely to have been given knowledge about science and logic.
Also, generally speaking minorities are more likely to be poor [for many reasons I don't feel like getting into. But in short: they get fucked]. So they're also the most likely to believe in religion.
Personally. As time goes on it seems certain things become common knowledge that were at some point vast breakthroughs in science. So, eventually nearly all religion will be seen as something rather silly.