Too many people believe that the Republican Party is the only thing standing in the way of turning the US into an extreme socialist-communist state. They're quite mistaken about that, but that conviction leads them to forgive almost anything.
It what happens when you mix a two-party system, rampant bothsideism, and cause purity into one big pot and cook it in a post-fact world.
The Right has embraced extreme, even violent and fascist, far-Right rhetoric largely (although obviously not completely) out of the stupid, misguided idea that it has to "protect" some concept of "real America" from going too far to the Left.
The problems with this are obvious, but have all the possible ways of explaining it to people have been hunted down and destroyed in the quest to destroy all ways of actually effectively processing information to get us to the post-fact world that people just need to live in now.
1. As I keep screaming at a lot of people the "Left to Right" political scale isn't... like a thing that really exists. It's not some natural force of the universe like the poles of a magnetic or the charge of a battery terminal. You don't have to, indeed can't, "correct" for an overbalance because, again, IT'S NOT A REAL SCALE.
2. As people who live outside the US can't help but remind us at every single possibility, the US is skewed far enough to the Left that even if point 1 wasn't true America getting "Too Left" isn't a problem we're going to have to worry about for a while.
3. Even if points 1 and 2 weren't true the even bigger problem is that no concept is neutral anymore. As soon as any idea gets into the public discourse it is either claimed by or assigned to one of the two "sides" and they have to defend it and answer for it.
And as much as the fanboys, and again I use that term very deliberately, for the two political dynasties, another term I use deliberately, in America like to pretend otherwise the Left/Right divide in America is massively arbitrary at times, with which side has to adopt which idea based more on tone and personality than actual political thought processes.