You mean, like set up an autonomous zone in a center of the city and kick the police out? Burn down a federal court? Destroy the police station? Take over capitol building and occupy it for several weeks? Attack an elected official's family at their own home because you don't like their policies? Yeah, that happened, but not sure how immersed in QAnon belief system (whatever it is) that was. All I know the democracy survived all that.
Neither side sees themselves as terrorist, they see themselves as freedom fighters. Both groups are idiots and damaging the country. If you support either, you're adding fuel to the fire. Big Tech stepping in and shutting a group off the internet may see correct today, but all political tides wane and a new wave comes in, how sure are you that it will be the wave you want and not one where you're the dangerous one we have to silence?
Society apparently has little defense against this sort of viral, distributed cult and people are scrambling. I'm pretty sure that ad-hoc ostracism effected by large social media companies isn't the best approach, but the cost of not doing anything is terrible.