What the bigot in chief practices is "stochastic terrorism": stirring up others to commit terrorism against randomly chosen members of groups he demonizes.

The hate groups in which people speak in favor of violence, in a way that will sooner or later bring about real violence, can be described as "collective incitement to stochastic violence."

Perhaps this can lead to a good criterion for judging the proper boundaries of freedom of speech, which have never included incitement to violence.