"Africa" is not an argument. "Eastern European girls" is not argument. At the very least, an argument requires a predicate.
And no one upholds the morality of slavery--not even of enslaving Long Islanders. (The inhabitants of Brooklyn, on the other hand, is another story...)
I thought that I could leave predicates, premises, and conclusions to each. I am not very good with a lot of words.
I think that you got the wrong end of the bull in re Long Island. No matter. I really liked the quip, and will steal it for use in the future. I loved "The Venereal Family". You deserve a Pulitzer for that! You show great promise - for the future.