I'm not sure the analogy of grieving works all that well, because it is typically sombre, done mostly in private, and topics are phrased delicately because of the emotional sensitivity.

This bears little resemblance to me to the way the 1619 Project, for example, was announced and discussed. It's blunt, public, and intense.

This doesn't make it wrong, necessarily. But it makes the metaphor fit rather poorly. I think things would look quite different if the issue actually was treated like the death of a relative.

You don't grieve by having your aunt say to you, "Hey, your uncle, he's dead now. DEAD. You get it? You never spent enough time with him, always found excuses to do your own stuff instead of prioritizing family, and now he's gone and how can you ever make amends for that? You're an awful person, always have been, right from your conception."

That's not really grieving. But it is what a lot of the social media approach to the issue seems to be.