But, I don't think the analogy to black slavery is meant to be there. It seems to me that some people just want (or need) it to be there.

Also, at the risk of being painted a heretic/racists/whatever. I'm not sure why the focus is so much on just black slavery; is it because it was most recent, or is it because of the current zeitgeist? Is it an American thing? Is it the "monkey" part and because some racist rednecks call black people monkeys? I find it mortifying we're giving those people so much influence over a fantasy world they're probably not even aware of.