[yanderekko]

Plenty of mass killers have cited left-wing sources as well. Demanding that people of all political affiliations self-censor based on vague and unprovable stochastic terrorism claims is an obvious nonstarter and I believe its apparent support is simply due to a (perhaps justified) tribalistic belief that such censorship will be demanded of one's enemies to a disproportionate extent than it's demanded of one's self.

[softcactus]

Yes, if a left wing agitator is rallying their followers to violence, they should face some sort of consequences, and they often have throughout the 20th century. It's not hard to find examples of American three-letter agencies targeting radical leftists. This isn't a hard concept to grasp.