I dont think that how racism works tough.
I don't want to get this thread of track so this is all I will say about our discussion. I'm a dark skinned Dominican, all of my cousins are white or lighter skinned,
my mom and aunts call me negrito, negro, etc (weirdly terms of endearment). I know the history of Dominican independence and while yes there was a treaty to try to unify the island, the Haitian rulers treated the now Dominican side really bad and taxed them heavily to pay back the French, hence the independence movement.
I know that on the island, Haitians get treated bad, I've seen it, and I've seen the weird after effects it causes. For instance, in Santiago I tried giving a Haitian worker some water
and they wouldn't accept it due to other Haitians looking (can accept things from Dominicans). That is instance in a sea of the crap I've seen or experienced. What i'm saying though is that yes, racism has a huge part to play in the Dominican/Haitian divide, but it is not the only thing. The past invasions (even after independence) and more recent arguments/conflict
between the two sides of the island have a huge part to play too. Tons of Dominicans feel like they have maintained their side of the island while Haiti has squandered theirs ( I don't agree with this sentiment). So those same people feel like other governments are trying to unify the island, which in turn would make it worse off (and you do see a lot of media proclaiming that the Hispaniola should be shared).
The one thing with Dominicans I have seen, is that while they will talk crap and say crude remarks about other Dominicans based on literally everything (hair, skin color, what part of the island you are from), regardless of all that, if you are indeed Dominican, it doesn't matter in the end. So I have heard dark skinned guys call white skinned Dominicans, 'el diablo', maltildo blanco, cochino, etc, but then turn around and get mad if those same guys referred to themselves anything else other than Dominican.
To get back on topic, that why this all so very weird. Latinos internally fight, until someone says something about us, then they band together. So while racism exist and is indeed one of the biggest problems (just look at univision or telemundo), those same racist weirdly are the first to embrace you when shit goes down, as long as you are from the same country. Its all very complicated and insanely messed up. I really don't get it.