Nor does offensive speech.Inoffensive speech does not need protection.
Actually, the REASON for protection of free speech is the protection of offensive speech. As long as it remains SPEECH, it SHOULD be protected, however vile. Someone can spew all the hate they want, and has the RIGHT to do so. That RIGHT should NOT be infringed simply because someone finds it offensive.
There is a big difference between advocating violence and simply being offensive.Speech which advocates violence because of race, religion, sex, etc. is "hate speech."
Speech which advocates violence for the sake of violence is "hate speech."