Why don't you ever see black people on cruise ships? They aren't falling for *that* one again.
How can you make jokes about blacks on slave ships?
Why shouldn't black people be slaves? They must have deserved it.
Your statements and joke inherently condone slavery of blacks and that cannot be condoned as it is not right. Don't diminish and neuter the violence and aggression these people suffered because that says that it isn't an important subject.