I've been trying to find the right way to articulate this-- but the folks on the right have it backwards about who is driven by "white guilt" --
This impulse to cover up and distort the history of slavery reeks of shame. It's, frankly, weird. Nobody has perfect ancestors, what sort of crisis of identity leads one to lie about the past.
It's just the things that happened. You learn about them you learn from them. You do better. Don't make it so emotional and personal.