a black man walks into a bar with a parrot on his shoulder the bartender asks " where did you get that ?  " the parrot replies " africa "
Are you making a joke about the history of slave in the US?
Yes I am.
Generalizing all blacks by calling them slaves is not right. They were freed over a century ago and continue to be free people to this day. I think you'd benefit from some proper education on the subject so that you don't keep making the same mistakes.