One of the guys in my electronics class in the Air Force was from Puerto Rico. The class lasted for forty weeks. He was not allowed in the white or colored sections of Biloxi, Mississippi.
The Jefferson Davis house was in nearby Gulf Port. Davis was still considered a hero. Most of the people seemed to be full of hatred. I graduated from tech school and had left the area for the West Coast a few days before the June 21, 1964 event (below link).