I think it's deeper than that...
Sure, some maga really believes what Trump says, but an absolute shit ton of his voters think "both sides lie".
So in their heads, trump was never going to get all the gang members and criminals out, so everything next just wasn't assumed to get to happen.
And you can't fault them really, like, we went from "trump never tells the truth" to "why didn't you believe trump" so fast people are breaking necks left and right.
The important focus should be on the good stuff the hateful people want, because it's the same shit the rest of us want.
Give them an authentic progressive president that will really try to deliver on campaign promises and all voters will start taking what a candidate says seriously against. When it's assumed all politicians lie, we'll keep electing people like trump.