I didn't make that claim, although I regret trying to trim down my comment because now I can't easily quote what I really said. Indeed, it's quite disingenuous to put those words in quotes!

I claimed that it's not calling for violence that silences people, but the resulting violence itself. As a result if we just cool down the violence then no new restrictions on speech are necessary. Indeed, if the physical world is kept safe, then no speech will be scary.

You might not think we can be trusted to keep the real world safe, but then how can you expect the same imperfect society to keep speech tamped down?