Actually Europeans did the same in not so long ago, not as slaves, but as slavers (or some more fancy words), so people can go down much further IMHO.
The greater picture is this: Haitians were slaves and had every right to fight against their oppression. The "white Europeans" belonged back home in France. They brought it on themselves.
I always like to use this thought experiment: which of the two sides had power to change the situation?
The Haitians couldn't help being slaves until they rebelled. The French could from the very start choose not to be slavers.
Sure, and the Soviets claimed the Katyn massacre was perpetrated by the Nazis.
Consider sprinkling a few grains of salt on contemporary accounts by interested parties.