You should pick up a history book...and read it. Maybe it would be more accurate to say Democrats instead of the left, but that's a distinction without a difference.
Confederate leaders and the vast majority of secessionists were Southern Democrats. They championed states' rights and the expansion of slavery.
The Ku Klux Klan was founded by individual Confederate veterans in Pulaski, Tennessee, in 1865. While the Democratic Party did not formally create the KKK, the original Klan was heavily composed of Southern Democrats who used the organization as a militant wing to terrorize newly freed Black people and suppress the Republican Party during Reconstruction. [1, 2, 3, 4]
I find it interesting how you, Husker and the Left ignore well established facts. Is it just gas lighting, ignorance or a lack of emotional maturity...or combination thereof?