Your entire argument is predicated on the notion that cancelling a movement trying to overthrow a democratic election is a slippery slope. This is false; the events of 1/6 has forced people to take a side or potentially watch democracy die. This isn’t a fringe movement at all, there were congressmen taking part in the riot, our president actively encouraged it and 74 million voted for the guy who refuses to admit defeat.

At what point exactly do people start to get uncomfortable enough to spring into action? No one knows for sure, but this seems like a pretty good place.

By current standards, a big part of human decency is putting the safety of the marginalized before the comfort of the privileged. Republicans as a whole have a very poor track record with that.