The US was a bit less active in the rebuilding of the South. Less forgiving. Pretty much left it to the carpetbaggers n crooks. Some may argue and say the Feds did try to help but we all know it was for the Freedman's Bureau. Not for the former Confederate families. It probably took to the turn of the century to get to the nicey nice stage.
Since so many of the leaders in both armies were friends or kin before the war, it may have helped bridge that gap for them all parading down Main Street. I don't know. I'm still a bit puzzled by Germans though. My Granddaddy was in both World Wars and I don't think he'd have had a smile for them.