I think you've hit the nail on the head. There is no behavior authoritarians can't recontextualize as justified and righteous if they're doing it. Those in the conservative political machine will eventually talk themselves into the virtues of fascism and mass ethnic deportation and genocide, they will curtail free speech in libraries and restrict the Black Panthers' right to bear arms and attack the corporate pride created by the free market. There is no principle so cherished or idealized they will not cannibalize it in the name of enforcing the status quo, or reverting to what they imagine it once was.
And when they're not yet ready to embrace something they have an endless capacity to deny reality. They're masters of deny, attack, reverse victim and offender. Hell they can even openly acknowledge it to one audience and deny it to another, and the dissonance will be ignored.
But it is all in service of enforcing their place as the privileged normal.
And the thing about saying that someone is fascist or bigoted or close-minded or hateful, with the implication that these things are bad and corrosive to a functioning community, and so people who hold these traits are outside of acceptable norms ... is that norms can be defined to include those awful things. Or that reality can be rejected.
But you can't redefine weird as part of the privileged normal. You can accept being weird as part of your identity, even revel in it, punks and queer folk and goths and nerds have been doing that forever. But the one thing weird can never be is part of the privileged normal.
But it also can't be denied in the sense of rejecting reality! Because calling someone weird is a performative statement, in the philosophy sense that it performs an action. To call someone weird is to describe them as being rejected by normative society, sure, but it is also the act of rejecting them from normative society. Calling someone weird performs the function of making them weird. It defines someone as rejected by declaring their rejection.
So there's no twisting of reality to perform here, there's no turning January 6th into somehow not an attempted coup, nor is there saying that if it was a coup it would be good. And therefore, implicitly, making is so that they have not violated norms by being cool with it.
Calling Republicans weird is rejection from normative society in its purest and most unassailable form. There is no way to not be weird if enough people say you are weird, because that is how weird is defined. And it is what they crave above all else.
So yeah. If you want to stifle conservative bigotry in social spaces you're in, or if you want to try to up the social cost of conservatism enough that they no longer enjoy throwing their weight behind it. Call them weird.
It's well deserved after all. They are weird.