Give it up. The division was over slavery. State's rights didn't enter into the picture except as an excuse to support slavery's spread. Yes, slavery was the "camel that broke the straw back" to use Fred Flinstone's immortal words. But there was also the issue of whether the individual states would be allowed to decide for themselves, or whether dictum would come down from D.C.
(What concerns me right now is that human slavery is still practiced by Muslims over animists and Christians in Africa, and in the child sex trade in a number of places...we need to eliminate those TOO.)
Cheers!
You need to read the secession documents of the seceding states to see that the only motivation was a promotion of slavery. In short, the CSA was never more than a morally flawed slave empire. There was no federal usurpation, just a historically justified (Northwest Ordinance) restriction of slavery in the territories.