Sorry, but you need to get your history straight. The single issue that split this nation and caused the Southern states to mutiny and begin a war that killed and injured more Americans than all other wars was slavery.
Alexander Stephens, VP of the CSA said

The new constitution has put at rest, forever, all the agitating questions relating to our peculiar institution -- African slavery as it exists amongst us -- the proper status of the negro in our form of civilization. This was the immediate cause of the late rupture and present revolution. Jefferson in his forecast, had anticipated this, as the "rock upon which the old Union would split." He was right. What was conjecture with him, is now a realized fact. ..Our new Government is founded upon exactly the opposite ideas; its foundations are laid, its cornerstone rests, upon the great truth that the negro is not equal to the white man; that slavery, subordination to the superior race, is his natural and normal condition. This, our new government, is the first, in the history of the world, based upon this great physical, philosophical, and moral truth.”


How many more quotes would you like from the people who created the CSA and the war, from their state constitutions and documents stating very clearly that the issue of slavery is what caused the south to revolt?

How about reading the Mississippi declaration of secession.
Avalon Project - Confederate States of America - Mississippi Secession

Our position is thoroughly identified with the institution of slavery-- the greatest material interest of the world. Its labor supplies the product which constitutes by far the largest and most important portions of commerce of the earth. These products are peculiar to the climate verging on the tropical regions, and by an imperious law of nature, none but the black race can bear exposure to the tropical sun. These products have become necessities of the world, and a blow at slavery is a blow at commerce and civilization. That blow has been long aimed at the institution, and was at the point of reaching its consummation. There was no choice left us but submission to the mandates of abolition, or a dissolution of the Union, whose principles had been subverted to work out our ruin.


The Civil War was about slavery, about the coming to power of men who supported abolition of slavery. There was not a whiff of concern about taxation without representation, and the issue of state's rights was about the right of the state to determine the ownership of the Negro.

Here is Jefferson Davis's farewell speech to the US Senate as he leaves to join the CSA
Farewell Speech | Teaching American History
Slavery again, slavery is the issue.

It was that issue, the God-given superiority of the White man and the proper place of the Negro as his slave, complete with the curse of Canaan on his head that sparked the Civil War, and that issue is represented by the flag so happily taken up as a symbol by the KKK today.