EDIT: Typos
Of course, the lines as always get blurry. To use a random example that comes to mind, when Kathy Griffin posted the severed head of Trump - was that a direct call to violence? That's a tough one to answer. My first intuition is that it does cross the line, but I could very easily see an argument that it's not.
So unfortunately there will always be that difficulty, unless we committed to an absolutist position of not removing ANY speech. I drink a lot of the kool-aid, and even I don't go that far.
That causes genocides to happen though -- are you okay with that or did you not know
To disagree is to argue that human beings are nothing but programmable devices. If that's your position, fine, but we'll have to disagree.