Culture shock... everyone thinks I'm a racist! What's your opinion?

I don't think you're racist, but you have to realize that when in Rome one must do as the Romans do. When I was little I had a friend who was the darkest in her family and her mom called her negrita, and her sister who was larger was called gorda. This was odd to me, but in general just because it wasn't a part of my culture didn't make it offensive or wrong within their family. I'm from California and I live in Germany, and people here are very stand offish, and I can't speak to a complete stranger the same way I would in the state, that's just not how things are done here. It's a difference in culture that one must get used to.