To me, it's completely insane. There's no other way to put it. Everyone saw it coming from Mitch McConnell to Tucker Carlson and said, oh well, fuck it, at least I get mine. Literally everyone saw it coming years ago.
They let it happen because the want a dictator once and for all to keep those pesky Dems from having any power from now to eternity. A black Democrat two term president was the last straw for these people, I think. You can go all the way back to before the 2016 election and find Roger Stone promoting the stolen election CT to the effect that Trump should say it was stolen at every opportunity if he loses. The Mercers, Bannon, Stone, et al., concocted this all the way back then. And now they've gotten what they wanted except for one hurdle to cross, the 2024 election.
Sadly, what Trump's backers could never have foreseen was his inerrant stupidity and the effortlessness with which he made a point of it at every opportunity. Take the documents case. Trump has gone and gotten himself into deep debt with a lot of nasty people--I think that's what the nuke secrets were for--so instead of just giving everything back to the feds, he tried to hide them and destroy evidence. Why he's not behind bars for that alone while awaiting trial I have no idea, but apparently, because the Republicans can't stomach being the opposition for the next 4 years, the Republican establishment wouldn't cut ties with this ditch pig and now they're getting fucked like recalcitrant sows.