The thing is that most of the statues in question were not created prior to the civil war, or even directly after. They were funded and installed by people mad about reconstruction and later about desegregation. Many of the statues being discussed today were put in place in the 50s. They have no historical relevance except as a monument to the racists who wanted a large, visible reminder that they had power at one point, as a threat that they'd continue trying to gain it back.