Nothing should be. "Hate speech" is an absurd concept that should have no place in any civilized society that considers freedom of expression to be even slightly important.

Merely expressing an idea, even if it involves negativity or dislike toward a certain group of people, is not in itself harmful. Now, harm may arise if somebody in turn acts after being exposed to such material. But the responsibility for that harmful act should lay solely with the individual or individuals who perpetrated it, not with people who merely expressed ideas that may have been observed by the perpetrator.