>>> "It's a modern invention by the same sorts of people who assert that only white Americans had slaves, and other historical re-interpretations designed to extract concessions from rich westerners."
Are you serious? You think, Americans who believe chattel slavery in the US was one of the foremost abominations in human history is trying to extract monetary concessions from rich people? That is some seriously twisted thinking from your part.
The legacy of slavery and Jim Crow is unparalleled, legacy of that is hurting people even to this day, trying lessen the impact of slavery in the US is offensive.