By ancestors of slaves in my comment above, I meant to type offspring. Of course most slaves also had slave ancestors, and most slaves had slave offspring. That is the nightmare of inter-generational slavery. At one point in history, I forget the date, it was estimated that a slave could look 7 generations back and find slave ancestors and with the benefit of a crystal ball, would be able to see 7 generations forward that would also be slaves. No other demographic in America or modern history has been subject to that unspeakable tyranny and inhumanity.

But it didn't end with slavery. Slaves also had "free" offspring and subsequent descendants who were subject to over a century and a half of anti-black discrimination, marginalization, exclusion, and terrorism. 

Enough celebration of white supremacy and tyranny. Let's stop erasing descendants of slaves to prop up descendants of white supremacists.