It's really disappointing to see such reactionary comments on HN. Obviously Facebook ought to pay more attention to anti-Black racism: this has historically been where the problem is, and so it's where the bulk of the effort should go.
We need a principled stand against racially incendiary rhetoric or none at all. Either the basis needs to be the First Amendment, in which none of it should be policed, or it needs to be evenly applied regardless of race, and people who post hate about Whites need to be banned from social media instead of verified and glorified.
Disappointing, yes. Surprising? No.