Because most of history being taught seems to be 'Kraut man bad'.
I'm not sure how bad it's gotten now, but during my history GCSE they changed the material around as we were doing it. I couldn't really tell back when I was doing it, but going over some of my notes from then it's pretty fucking grim. In the space of two years the teaching on WW2 and the Nazi's especially went from 'The people were abused by the Nazi's, and most of them didn't think their leader knew what was going on; and thought that he was a good person being taken advantage of by the inner parties anti jewish sentiment.' to 'The German people were complicit in mass murder, and were gagging for war and world domination'.