I'm working on a history page and I had a feeling that I was going to get stumped on it. One a few sites I found that the confederates were for it, and others say they were against it. I'm trying not to be inaccurate on the information.
Most people in the South were in favor of slavery, including many farmers who had only one or two slaves. There were people who thought it was wrong. Born in South Carolina, Sarah Moore Grimké (1792–1873) and Angelina Emily Grimké (1805–1879), known as the Grimké sisters, were the first American female advocates of abolition and women's rights. They were writers, orators, and educators. They were ignored at first, and then generated so much controversy that they both moved north to Pennsylvania. The movie "The Free State of Jones," released last year, I think, is a true story about a Confederates soldier deserting to go home in Mississippi to lead a revolt opposed to slavery.
There can be no doubt whatsoever that the Civil War and secession was about slavery. The secession documents of the states state this very plainly, and Alexander Stephens, the VP of the Confederacy, also stated this very plainly in his memoirs.