This New Yorker article has some interesting analysis which really concludes that they aren’t all that religious.
More of a white Christian ‘merika f@ck yeah! crowd.
Afraid of immigration and minorities.
They like the kick ass style - screw the libs style that Trump has. Not really that religious.
If we are thinking his followers will turn on him due to his immoral behavior - well it seems unlikely to happen until the very end.
On edit: You might want to compare it to your winning football coach: You’re annoyed that he’s overweight got caught doing drugs. sleeps around, yells at the kids professionally, but dammit he’s got your team on a winning streak and headed to the playoffs and you’ll put up with that.
https://www.newyorker.com/news/on-religion/what-it-would-take-for-evangelicals-to-turn-on-president-trump