The Civil War is over and American public culture generally avows the principle that abiding by election results is good, armed rebellion against the US government is bad, and chattel slavery is very bad. Nonetheless monuments to the idea of launching an armed rebellion against the US government when a political party hostile to chattel slavery wins an election are incredibly widespread.
Part of me view the confederate flag as a right wing Che shirt. Far less about pro-slavery sympathy than a flipping a big middle finger at those on the left. Especially those north of the Mason-Dixon line.