If this was true, then prosecute for incitement to violent insurrection which is already a crime. We already have the means to police unlawful speech, censorship need not be one of them.
I guess we'll see. They couldn't get it done after he obstructed a federal investigation. They couldn't get it done after he extorted a bribe from Ukraine. Now he's incited an insurrection, so who knows if that's enough.