The relationship between the North and black experiences were that the North respected African Americans as people. They have them jobs, they didn't segregate schools or restrooms or even water fountains.
However, in the South many people saw Black people as otherworldly. They decided that black people did not deserve the same respect as white men. Black people have seen the same way women were they were to be used and they did not deserve rights. They were seen as people to be owned not as their own individual.