"The South" and "The North" of the civil war era are even less distinct geographical units than they were at the time of the civil war (and, to an extent, the impression caused by factional control of state governments at the time of the war was misleading even then, many states had substantial factions -- including military units -- supporting both sides.)
I grew up south of the Mason-Dixson line, very common to see confederate flags, and occasionally burning crosses in people's yards.
Where in "the south" did I grow up?
About a 35 minute drive down I95 from Philadelphia.
But that being said, I don't agree that giving in to sectionalism is the answer.
We have more in common most of the time than the news entertainment industry would lead us to believe.