

I think they are just talking about annoying main-character type people you see traveling all over the world. It’s not really an American thing, it’s just that a you’re likely to come across an American one of these assholes due to various statistical factors. I’m sure in Spain they have the same idea about the English, or in Indonesia about Australians.
If you’re the type of person to think about this and contemplate how people perceive you, I strongly suspect you are not going to annoy anyone.





Those were just random examples that came to mind. I’m sure there are places where people have an impression of Chinese people based on tourists, etc.
Americans just stand out because you see them everywhere, because they have a huge amount of wealth.
The point I was trying to make is that it’s tourists in general who might tend to be more annoying.