Your comment proves the guy's point. Hate speech is subjective. There is no "blurred lines" around hate speech. All hate speech is protected speech. Supreme Court has repeatedly ruled on that.

https://www.washingtonpost.com/news/volokh-conspiracy/wp/201...

If we don't have hate speech, we necessarily don't have free speech. All speech should be allowed. Hate speech should be criticized but not banned.