The South most definitely did not reject the founding fathers. They embraced them. The vast majority of the Founding Fathers were in fact, Southerners themselves. Washington, Jefferson, Madison, Monroe, Patrick Henry, James Mason, John Jay, etc etc.
Marx and his disciples were in fact more sympathetic to the North because they were interested in centralizing power. They detested the idea of decentralized power. Decentralized power which the South supported was the antithesis of their whole ideology.
I wouldn’t be so sure about that. Larry’s textbook indicated Lincoln had little interest in Marx other than maybe a few correspondences, and aside from that, Marx and Engels’ letters indicated they actually thought the South had more potential for ginning up a French-style Revolution and clearly wanted that result.