How do you "incite hatred"? Inciting violence I can understand, but I'm curious what you meant by your statement. I feel hatred can be instilled, but not sure how it can be incited.
It is the consistent position of the United States Supreme Court that hate speech is protected free speech.
The US Supreme court has overruled that before.
The US Supreme court is not the end-all-be-all of legal systems. Most European systems do consider that hate speech can be proscribed, as do most Latin American jurisdictions.