It is a common misconception that the Confederacy is about slavery. That is simply not the case. It's about state rights and reducing the power of the federal government. I do not support slavery, but I don't support massive bureaucratic federal governments either. A confederate system is far more efficient and allows states to be more tailored to the desires of the people of those states.
LOL - history would like to have a word with you. Plenty of states outright said it was about slavery in their declarations of causes of secession - all within the first few sentences, no less.