Amazon aren't the only provider of hosting services, even if they are one of the largest. It's entirely doable to shift providers, even in the face of censorship - The Pirate Bay is one long-running example of this.
I'm not sure how you missed the point by that much. Infrastructure bans are a thing now. You can't produce an app to compete with Twitter and Facebook if you don't have access to scalable infrastructure. Moving to a different host to get canceled there isn't a solution.
I recognize that you were being facetious, but this is work a look.
Greater decentralization, smaller polities and a less powerful federal government could be a workable solution. It doesn't have to go to the point of secession. It is possible to respond with tolerance and let all sides live according to their wishes.
Regardless of the precise definition, it seems quite clear that it ought to include those who organize premeditated violence. This is not exactly a slippery slope.
Just ban people who spout violence towards people for what amounts to the crime of existing, who spout conspiracies that are divorced from reality.
You don’t choose who is extremist, you ban the abusive content. Extremists the mostly post that are functionally banned - that’s what Twitter does. You don’t get to report “this person is abusive” just tweets that have to be abusive on their own.