The Bible records one Adam and one Eve. And one Noah. Obviously, it was the ordained by God that races devoloped after that, or else it wouldn't have happened. Likewise, interracial marriage is ordained by God, for the same reason. Why? Because it was His will.
I wonder if preachers in the old south, when they preached on that incident in which Aaron and Mariam got leprosy, tried to contort it to not say what it said the way liberal preachers do with the parts about homosexuality.
Or the way Arminians try to contort Romans 9.