Thank you for your concern about the future of the GOP. I share it.
The summer 2020 rioters were your people -- they weren't Republican voters. They were your people in two senses:
(1) The ghetto lumpens who came out to steal things, if they bother to vote, will vote Democratic. (They're usually too drugged up to go down to the polling station, thus the big push for mail-in ballots which can be harvested.)
(2) Young white radicals, "AntiFa", much cossetted by liberals. They're the ones whose more deranged members murder conservatives, to the cheers and laughter of the others and the public approval of leftist academics.
Of course any high-profile national Democratic politician with a working survival instinct is not going to come out and openly endorse rioting, or even 'defunding the police': they're not stupid. They'll arrange for bail money to be sent to the rioters, they'll call for continuing 'unrest' in the streets, they'll threaten Republican political figures with being mobbed at restraunts ... but they won't openly say, "Burn down those Korean shops!"
But 'the Left' is more than national Democratic politicians.
We have to look at local Democratic politicians and political figures, to see their reaction to criminality and "threats to democracy"..among their voting base and supporters.
And there we see a different picture.
We need to look at liberal academics when they write their books and papers about AntiFa, praising them.
Or as the liberal professoriate watch approvingly when radical leftist students break up conservative meetings on campus. The silence of liberal journalists of mainstream magazines about what has now become routine on American campuses is also a statement.
We have to look at the District Attorneys in liberal areas -- although if they go a bit too far in their lenient attitudes towards criminals, and unleash mass shoplifting mobs on the upscale stores of their liberal voters, they'll get recalled, as happened in San Francisco.
And if we do that, we see a different story. Toleration of violence carried out by an important component of the Left's base.
But ... I'm not accusing you of hypocrisy. Both of us say, if someone from our side has committed a crime, let the law take its course, so long as it's fair. The 6 January rioters will have to accept their punishment -- whether or not they were lured into a trap, or just stepped into it with eyes open, they did it and there are consequences.
But they're our own, so we will support them, just like your side sees the earlier rioters, or the campus Red Guards attacking conservative speakers, as your own, and takes the same attitude.
We're not yet openly at war, when, as the saying goes, the laws go silent. Our civil war is still a 'cold' one so far. But neither side is going to repudiate its supporters when they do anti-democratic things. It's just the logic of the situation.