I think a common failure (intentional or not) in discussing free speech is isolating free speech absolutism from the sort of free speech that we'd be happy to accept in a liberal, open society. Speaking practically and from the absolutist perspective, there should be no legal penalty for inciting others to violence. However, I think that (nearly) all of us recognize the importance of motive in cases -- we rightfully…
Not to mention failure to distinguish exercise of free speech (permitted) from discrimination against protected classes (prohibited). (The old "I'm exercising my right to free speech by refusing to provide gays/blacks/etc. services" argument.) "My rights end where your rights begin" is an important pillar of modern society that really precludes any sort of absolutism about free speech.
[1] https://en.wikipedia.org/wiki/First_Amendment_to_the_United_...