. . . I will confirm it with my own experience. My Air Force family moved to Bossier City LA in 1965; I was 7 y.o.. The first black children I ever saw were at a hotel we lived at while my parents bought a house. They were AF brats as well. The first recess from classes at school I was also queried as to my Yankee/Rebel status. Having no idea what was being asked, since I was born in Florida and had just moved from Virginia, both slave states before and during the Civil War, I was permitted to be a Rebel, although I still had know idea what that meant. The purpose for the query was to determine which side of a game I would play for. The game played as follows: the Yanks lined up on one side of the field, the Rebs the other. At an agreed upon signal both teams charged toward the middle and commenced to drag each other to their home side, taking them prisoner. Also, teammates could free those captured by invading the opponents base and escorting the prisoner through the battlefield across the midpoint. This event was reenacted everyday at recess, weather permitting. If the "game" became too violent, the recess monitors would intercede and break it up. In 1968 we moved to the heart of Yankeeland, Chicopee, Massachusetts where whiffle ball was the favored pastime.
The point being, southerners are indoctrinated into Rebel culture from an early age. It is one of the primary aspects of Southern culture and despite any laws, social movements or amendments to the Constitution, it prevails to this day.