But it is that simple. The people of the south based their economy and culture on a huge evil. They wanted to beak away from the union because they felt that the rest of the union would, eventually try to force them to end this huge evil. That is pretty much all there is to it. Everything else is window dressing.There is a scene in an episode of The Simpsons where Apu is taking his citizenship test. He is asked the question "What was the cause of the Civil War?" He begins to explain that there were actually several causes, social, political and economic, when the man giving him the test interrupts him and says "Just say slavery."
For some people, this is all they can understand: The war was about slavery. The North were the good guys, the South were the bad guys.
Trying to explain that it was actually much, much more complicated than all that only confuses these people. It's best not to try (I also learned that from The Simpsons.)
Look, so some of your great great grandparents were indirectly involved in something pretty horrific. So what? Why go to such lengths to try to hide it? If you go back far enough, many of our anscestors did pretty horrific things. We don't need to put so much effort into rewritting history to protect their honor.