Combination of decadence, selfishness, cultism and vindictive politics.
The first two are self explanatory and certainly cross party lines.
Cult of Trump is to merely accept his say so that mask wearing has no efficacy and is merely political correctness. And really believe he knows better than scientists (anyone really).
From many conversations, it's just to piss off liberals. What I call vindictive politics. Literally many conversations, why do you like Trump and agree with him on things like fighting over masks? Schadenfreude. Making liberals scoff and angry makes them happy.
Ok why so much annoyance with liberal? A common example, is gay marriage which many Trump supporters consider completely immoral on religious grounds. It's so heinous to them they use oral rape metaphor to describe it: you liberals jammed gay marriage down our throats. We support Trump because he makes you angry.
I've asked for clarification: this is pay back for things like gay marriage and protecting abortion rights? "You betcha its payback! We don't care what crazy things he does or says. The more it pisses off liberals the better job he's doing." Their words. They have grievances. Trump soothes it by helping them get payback.
He grew his base by 7 million in this election. He gained almost as many votes as Bernie Sanders total vote count in the 2020 primary.
A lot of people think this is about Trump. And it's gone once he's gone. I don't.