Twitter and Facebook both have done a horrible job moderating hate speech. Both in terms of over-moderating in some places and under-moderating in others. But

Twitter and Facebook both have done a horrible job moderating hate speech. Both in terms of over-moderating in some places and under-moderating in others. But they actually moderate their content, and while there have been a few knee jerk reactions, they've mostly erred on the side of leaving things up rather than the reverse. Parler has knowingly left threats of rape, murder, and torture on their site indefinitely. The contrast is stark here.