I would guess I know the area as well as anyone - I grew up on both sides of the water - and each side as its quirks.
To give you a sense of where I went to High School - it was the same school as Allen Iverson, and the next closest high school was Warwick High in Newport News where Michael Vick went to school. These are schools where the racial make-up was about 50-50 white and black. I won't say we lived in peaceful harmony, but we had very few race fights - presumably because the numbers were relatively even. But, the underlying tones were definitely there - and you tended not to mix races in almost anything we did. I don't recall if anyone ever dressed up in black-face (that would not surprise me) - and I am pretty sure I never saw a Klan costume - but I know kids who would have applauded the choice.
I too have lived most of my life in the "South" I have spent time in North Carolina, about 12 years in Macon/Atlanta and now about a dozen years in Lexington. Tidewater - during the time I grew up there (I also lived their later as an adult) had the most racist overtones. Part of that was the time, part of that was the culture, and part of that was the culture being passed on from one generation to the next. (Some of the rural part of Metro Atlanta are very racist...but I never spent much time there to figure out how widespread it was...)
Does that mean that everyone in Tidewater was racist? No. Does that mean that being racist then should be acceptable? No. Can people change over time? I sure hope so.