Well, this is how history is probably going to pan out. During the actual Civil War it took a generation for the hate to start to peter out. New waves of immigrants also came that did not have the baggage of the Civil War and the older Americans with grudges died out. The same will happen here. The leftist baby boomers who tried to break
"Amerika" over its knee in the 60s will die out and new immigrants who could not give a hoot about the Vietnam War (and boy, does the left like to invoke Vietnam) will move in.