This is a pretty good discussion of this issue from Kyle. I agree with much of what he says, although I wish he would have given more recognition to the centuries-long history of censorship and state repression by leftist regimes. Usually, the response I get from leftists when I raise that issue is the same one I get from neo-Nazis about the Holocaust and Catholic traditionalists about the Inquisition: “It didn’t happen but it was justified but it wasn’t that bad but everyone else was doing it…”