“ The massacre excluded surviving Polish Legionnaires, who had defected from the French legion to become allied with the enslaved Africans, as well as the Germans who did not take part of the slave trade. They were instead granted full citizenship under the constitution and classified them as Noir, the new ruling ethnicity.”
(It's also weird how you're excluding the part where the Polish and the Germans were enfranchised by the Haitian government.)
While we're being complete, let's remember the part that the genocide extended to poor whites (not slaveholders) as well as women and children. The fact that they gave a pass to those who allied with them shows that the perpetrators were strategic, but does not detract from their bloodthirstiness.
As someone who believes in Karma, I am not surprised that a country founded on revenge at the race level has never managed to become a good place in any sense of the word.