Having a very educated wife from the South and being from the north myself it was interesting to see differences and similarities where we are told their is a latter.
In regards to the American Civil War, it seems the south are taught a form of apologetics similar to most German's have in regards to WWII. The state's rights thing is one form of it. But as all things many things are muddier than they seem. A lot of the propagandized history wants to have the North as the good guys. The truth is many in the north weren't for freeing the slaves either, they were for holding the union together.
Of all the American history, the most interesting in terms of propaganda is the Revolutionary War, my wife is a direct decedent of the Henry line, as in Patrick Henry. The family stories of what really happened in regard's to Henry and later is son are very very different then what I know I was taught. But the whole the red coats are coming, the red coats are coming... he was looking for a safe house to be hidden away... it was more the red coats are coming for ME. Oh and the state of Kentucky, which was handed to Patrick Henry, his son gambled and boozed it away. Our founding fathers were not so Heroic as we would like them to be.