Two things started the slow 10ish year journey to atheism for me. I can’t remember which happened first.
Some Mormon lads doing their mandatory missionary work knocked on our door when I was home alone. I decided, screw it, kill them with kindness. Maybe I’ll convert them! After I got them some ice water, they started the spiel. It was so stupid, how could anyone believe this? Then I thought, wait, how is what I believe any more believable? That was an unsettling thought that I could never really shake.
I also challenged myself to read the entire Bible (NIV) front to back (which I did, thankyouverymuch). I already had a lot of apologetics for the pentateuch warfare, slavery, etc. but in Psalms there’s a verse that basically goes, “blessed is he who dashes the babies on the rocks.” And like. What the fuck is that. In what possible circumstances is killing babies okay, let alone with God’s explicit endorsement? That also stuck in my head ever since.
There was a lot else in between, but years later I stumbled into a copy of The God Delusion. “Know thine enemy, right?” So I read it on lunch breaks at work. While I now know the book has a reputation for kinda bad philosophy, by the end it had tidily dismantled the last vestiges of the purely “rational” arguments to believe in God I still had. So I sat there, an atheist for the first time in my life.
I’d like to add some nuance to your observation.
We Americans, most of us anyway, went to public school. And in our history classes, we teach what has been called the “Standard American History Myth” by YouTube channel Knowing Better in their video on American Neo-slavery.
In short, America is founded on many ideals (freedom, liberty, etc), and we generally write our histories as if we have always believed in and acted according to those beliefs (with slavery being a “failure to live up to those ideals”). That’s the simple history we teach our kids here, it’s what we grow up believing, and the only people who ever really learn anything different had nontraditional learning opportunities (e.g. local experts in black history, American Indian history, etc), studied history at a university, or nowadays maybe learned from social media (like the above Knowing Better channel).
Manifest Destiny is a big example. We teach that America believed in their divinely inspired right to the American continent, from sea to shining sea. We do mention the Trail of Tears, but it’s taught as a brute fact at best, and as punishment for standing against America at worst. There’s no emotional processing that we did a bad thing and that we shouldn’t do that thing anymore. Most Americans would do it all again given the opportunity.
And that’s the big thing. We just… simply don’t have any sort of national level conscience. If we did something bad to someone, no we didn’t, and if we did, they deserved it.
I only really came to grips with America’s dark side in grad school by reading, listening, and watching interviews with black people who protested Jim Crowe and Asian Americans who told their experiences living in concentration camps (euphemistically “internment camps”) during WW2.
That, I think, is the biggest problem in the American psyche. Not only have we “never done anything wrong, really” but we’re also pumped up on religious symbolism (we’re a beacon on a hill, a light into the world, etc).
“Divinely inspired” crybully, basically. There’s a reason Trump resonates so strongly here. He’s the embodiment of “I am the best, I never did anything wrong, and fuck you for trying to insinuate otherwise, you ungrateful traitor.”