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.
"Colonel" Kangaroo?
Congratulations on your promotion!
Say hello to General Sanders for me.
(...my point was to take a swipe at the Dems, but thanks for the history lesson.)
Cheers!