Ironically, the folks who do these things will turn around and be critical, and scornful, of anti-Americanism is Germany!
Basically, it's OK for the American vandal to hate Germans, but not OK for Germans to hate him back.
What shocks me about this whole issue is that Germans are being ostracized (by too many Americans) for not being war-like and aggressive.
These people have very short memories and fail to recognize that Germans have been ass-kickers since the days of Rome, and were the instigators of two world wars. Their present anti-war attitude should be applauded.