I was reading a discussion post about people's experience with rude natives when they're traveling and apparently Germans are often hostile to Americans? I've always thought they were a brutally honest but friendly enough country usually. Obv it differs with individuals but do Germans tend to dislike Americans? (I don't mean loud obnoxious tourists, those can be from any country anyway.)
There‘s a 98% chance that no one in Germany will care that you‘re American. We get MILLIONS of tourists every year and many of them come from the USA. If an American felt that a German was actually „hostile“ to them, the American probably misbehaved or said something stupid.