When certain political groups say "we have to get in their faces" is that an incitement to violence or at least harassment?
Can I say, "in my opinion, politician X should be executed for crimes against America?" Is that incitement or just a protected statement of opinion?
When Hillary called 1/2 of Trump supporters "deplorables" isn't that hate speech? I heard plenty of people say that anti-vax people should be executed or at least left to starve to death (Chomsky said something like this). Is that hate or an opinion?
Hate speech is hopelessly vaguely defined and will be abused by whichever side is in power.