Yep, this is all (MAGA's rapid judo-flip and complete capture of the entire Republican apparatus, that right-wing authoritarian nationalism is popular at all, the legal and bureaucratic machinery being in place to enable authoritarianism) built on stuff that's been going on since the '70s. That's when the wave of neutering antitrust and deregulating media started, and that's what got us most of four decades of persistent unchallenged lies, dehumanization campaigns, and racism blasted at the public. Nixon's roughly the start of the current movement as far as direct action (the think tanks driving it precede him by a decade or two, but hadn't had much effect before him), with the cynical "war on drugs" aimed at enflaming racial animosity and providing tools to attack political opponents, and of course his downfall and pardon were what lit a flame under a lot of right-wingers' asses to re-make reality such that their crimes wouldn't have consequences again (Reagan and some Nixon alums would soon make early use of this, and test the "if we all just keep telling obvious lies and don't break ranks... can we maybe just get away with
whatever we want?" strategy, which turned out to work wonderfully)
All of what we're seeing is built on an electorate that was primed to elect Trump. The Republicans had been using them as a captured base to enable their neoliberal and imperialist policies, but they'd conditioned these folks to want Trumpism, not what they were actually delivering. The shit Trump says is largely the same shit you'd hear from Republican voters since at least the '90s, and what he does is largely shit they want done. They've been asking for e.g. authoritarian federal government crack-downs on cities since then, asking for reductions in law enforcement accountability, asking for no-due-process mass deportations, asking for pulling back from NATO, asking for a wall at the border and/or a militarized border, et c. Their media's been telling them all democratic organizations and the party itself are to-the-core rotten criminal enterprises and they believe that. They will cheer when ICE starts arresting members of congress and major democratic donors on dubious charges.