europeans bought nigerians from slave traders in africa and sold them to the yankees. yankees sold the "nigers" to southern states, and profited. then yankees have a moral epiphone and say we shouldn't have sold you slaves, they should be illegal now. southerners say, "that's fine for you but our state have rights also and we are out all of this money we paid you". yankees invade the south and kill everyone, so slaves voluntarily follow their owners to texas where slavery is still perfectly legal. the ones that fled north aren't welcome so they return to the south en masse. yankees decide to pressure texas to make slavery illegal also and then claim it was never about states rights or their own moral failures. texas and the rest of the south hate the yankees for centuries for milking them and then fucking them over.
United States