I don't? Let the triggering commence:
The history of whites buying black slaves (from other Africans as well as from the Arabs) is very embarrassing.
However, when given the choice, how many African Americans move back to Africa because they think their family will have a better life there? Not so many, right?
So it took a few generations, but now the blacks have the exact same rights as the whites, on a far better continent. That seems like a win-win in my humble non-American opinion. African Americans should just accept this fact and let the slavery thing go.
Just note that I am not condoning slavery, I am merely pointing out that there are lesser evils out of all the bad things happening in the world.
And stop bringing up the "Muslims being colonized by westerners" bullshit. If the Muslims hadn't conquered their way out of the Arabic peninsula, occupying lands that weren't (and IMO still to this day aren't) theirs, we wouldn't be having this discussion.