The 1st civil war was over states rights and slavery. The 2nd will be over states rights and tyranny. The result will be like our revolution, liberty.
Slavery was legal in the United States before, during and after the Civil War. The fight was not over slavery, the fight was over whether Washington DC would control the economics of the South, or whether the Southern states would control it themselves.
As a matter of fact, Washington DC offered them the "Corwin Amendment" which was a clear protection for continued slavery, but they had to remain in the Union to get the Corwin Amendment.
So the powers that were in Washington DC at the time, were perfectly willing to keep slavery so long as they kept control of the Southern economic production. (The South produced 3/4ths of all Federal revenue at the time.)
So it was over States Rights and Tyranny back then too.