To this day, it is not difficult to find a "bare" nerve in the USA South when the topic of the Civil War arises. Some southerners still refer to that terrible wonflict as "the Recent Unpleasantness" or "the War between the states." (Northerners, who, we recall, won that 5 year skirmish, have always named it "the Cvil War.")
Accordingly - and since WWII was so horrible, I am not surprised at German reaction to re-opening the two conflicts.
If the "Never Again" lesson is learned, the German spirit may be granted release from his self-fashioned Perdition.