Why especially in the South?
While the South has a lot of blacks, much of them are rural blacks, not as prone to violence and hate.
I would think the violence would be mostly in the big cities, especially those with ghettos and slums where a lot of people have no jobs and lots of idle time...
I was talking about the South in the 1780’s. Loyalists and Patriots both used the pretense of the war to settle scores with their neighbors.