[jakelazaroff]

It depends. Not sure of the threshold offhand, but I believe it has to do with “incitement of imminent lawlessness” — that is, whether your words are designed to cause specific violent acts (as opposed to just generally stirring up hate that ends up being violent).

Concrete examples: “Jews will not replace us” is protected speech; “everyone go out and find a Jew” to an angry mob is probably not.