Going from "violent groups to hate speech in a hurry" is a problem. Policing speech, on a giant platform like Facebook, is a huge issue. Adults, as Sasse pointed out, need to engage in debate. However petty the comment sections may be. Calling for violence isn't protected. We've already made that clear. But "hurting feelings" isn't hate speech. You don't have the right to go through life not getting offended. Otherwise, I would've sued Hillary Clinton whenever she called herself a woman. Don't lump me in with her.
People like Mark Zuckerberg are running the internet. They're the gatekeepers. They want to ban "hate speech" but can't even define the term. Scared?