Literally the dumbest argument ever. So what if Africans (who were used to a completely different form of slavery that did NOT entail the guarantee that all future generations born of current slaves would also be slaves) sold their fellow Africans? People taken as slaves after their tribes were defeated almost always integrated fully into the victorious clan. If they themselves did not, then their children did. How does this shift blame from those who engaged in that evil trade and profited, to the Africans who sold their own people?
If the mother of a 10 year old offers you her daughter to bang and you did it, would telling a jury that it was her fault for selling the child mean you would be found not guilty?
Holy poo people are dumb as fug. Jesus.