I view religion as a lifelong fear of dying while trying to candy coat it with fantasies of streets of gold or something as a reward. All the rules, rituals, and penance for deviation is a lifelong preparation to not be sent to suffer torment forever and ever and ever, because god loves you. Those with this view don't have the ability to reason, or are in complete denial of the reality of their existence.
Their end of times bullshit seems only to be a death wish, without the courage to end their own miserable existence.
People have believed in some type of metaphysical reality since long before any sort of written history. I won't go so far as to say it's genetic, but at the very least, our brains are wired to be compatible with such ideas. So much so that I can't think of any ancient civilization where religion wasn't a hugely significant part of their culture. For example, burial rituals go back 10k years at a base minimum and more likely, several times that.
Religion seems to be so basic to human existence, that it has existed on some level always and everywhere. It can't be as simple as a fear of death. If that had been the only reason, then certainly there would have been exceptions we could point to. Instead, it has been part of human culture with an almost oppressive consistency.
As for religion in its modern incarnation, of course it has been co-opted in a vast variety of ways. There's no arguing about its use as a method of control or source of power. And hard core evangelics definitely have something akin to a death wish. But for them, it's not death, it's salvation. You're whisked off to heaven without tasting death. Personally, I'm envious. I've spent most of my life trying to deal with my mortality and to that sucks ass doesn't even start to come close.
If organized religion was actually about faith/religious tenets and not power, you wouldn't have millionaire pastors and political arms of churches. It's that simple.
No doubt that's at the very least part of the motivation. Christianity didn't settle into its current form until around 300AD with the council of Nicea which created the new testament canon. Constantine organized that primarily for the purpose of creating a state faith. If the church fathers could agree on a canon, he would pay for it's written reproduction, distribution and state mandated acceptance.
But before that, there was a whole branch of Christianity that was something similar to the ancient mystery cults like Mithras. They were the Gnostics and the gnostic heresy took a couple hundred years to eradicate.
You guys joke, but when the Seventh seal is broken and the skies darken with crimson blood, the oceans empty of water and are filled with the tormented souls of those released from purgatory, seeking only jealous vengeance on the living, and the Demon Lords stalk the earth recruiting the wicked to lead their armies against us, who do you want on your side? Some pedo priest armed with a cross-shaped tchotchke and "faith," or a goddamn certified Demon Slayer?
I know where I'm going.
"Certified" you say? Where do I sign up?
The majority of Christians in America voted for Trump, twice. And the most religious of all of them, the Evangelicals, are like in love with him. So I think there is a lot more to the crazy wing of Christianity in this country than a few outliers as you seem to imply.
I'm sure you know this but white bread Episcopalians,l Methodists, Lutherans, etc, are also Christians - at least technically. But evangelicals seems to be where the market is growing while the older sects just seem to be trundling along.