Yeah, some Germans are dead like that. They are usually also the ones complaining about
yet another Holocaust memorial or things like that. I don't actually know if they're the majority or minority. But that girl was also just being impolite. If I go to another country, I should be interested in it, and be grateful if locals are willing to share their knowledge about the place. And the war is still a pretty prevalent subject in most parts of Europe, tough luck if you can't stand it. What most Germans don't get is that, at least in western Europe, if people talk about "Germany" or "the nazis" in this context, they are talking about times past, and not about, well, the people they are talking to.
I mean, if I show someone around Berlin and explain how this or that part got completely destroyed in the war, I'm not pointing my finger at them and accusing them of destroying my hometown. I'm just explaining why things are the way they are in the town I grew up in and never knew otherwise anyway.
When I was in England last summer, people were all over the subject, knowingly teasing me with it. I just played along, because the one moment, they were saying something about the SS, the next moment they gave me another beer, and the next one, they talked about how much they were looking forward to seeing Rammstein that evening. One bloke told me about how he had spent several months in Germany, and he took a guided tour in Hanover. When the tour guide showed him around the city centre, the bloke said: "My dad helped design this place." "Oh, was he an architect?" "No, he was with the Royal Air Force."