Generally "free Speech" trumps hate speech, But if someone proposes and advocate hateful actions, and then someone known to have listened to that go and do those things Then the person proposing it can be prosecuted for 'inciting violense'. And the person who did it is still liable to be procecuted for having done it.
Like yelling FIRE in a crowded room when there was none and people stampede to get out and some die or get injured. Thank you for your thoughtful reply JakobA and Happy Solar Eclipse Day! :)