1. "Revisionism" is not a dirty word. Some historical revisionists are right, some are wrong, and very frequently they make assertions about which people of good faith may differ. People still argue about who it was that started the First World War.
2. When I was a kid, everyone said the War of the Rebellion was about states rights. That was gospel in the South, and was politely echoed in the history books in the name of reconciliation. I believed it myself. In those days, I thought I was a Southerner. I stopped believing all that shortly after Brown v. Topeka Board of Education (1953), when I began to think about what it meant to be a Southerner.
3. The War of the Rebellion did not come about because of "states' rights." There was no particular threat to any state's rights. If you disagree, tell me what was happening in 1860 that threatened any state's rights? What happened was, a President was elected who did not want to see slavery extended to the Territories. I fail to see what that had to do with "states' rights." Of course, I could be wrong. If so, please enlighten me.