As grim and deadly as Nathan Bedford Forrest was, I can't imagine he or his fellow travelers cared much for song. Soldiers often sang on both sides, as we know, but this bunch was made of much nastier stuff.
Nearing 70 now, I remember the "old south," most particularly coastal Texas, in the 1940's and 1950's. What I saw angered and disgusted me even as a child. People who hide behind bedsheets (or terrorists' masks) while doing their dirty work should be ridiculed and exposed. If you can do that by singing, I'm all for it.