Yeah, it's my fault too that this guy's grandmother was a slave. My family didn't come to the US till the early 1900s. In fact, I would wager that most of us with European ancestors probably could find some who centuries ago were serfs -- that is, they were slaves too.
Slavery was a dark time in our nation's history, but that is what it is now -- history. It's over and done with. In the years since, I think this nation has bent over backwards trying to lift up people of color. If this guy and people like him don't take advantage of the opportunities which exist, then it's not our fault. And if they aren't happy here, then they can move to the hellhole that is most of Africa. I'd bet most of them wouldn't last day in many African countries.