As an outsider sometimes you are not aware of cultural norms, but I always felt the margin for error for what Americans considered "acceptable" was too narrow. There was no benefit of doubt, and sometimes an explicit dislike for someone who did not immediately fit in.
No, I’m not trying to be disrespectful and I’m doing my best to be respectful. But it was culture shock and I wasn't used to the array of “we don’t do that here” and “you can’t dress like that there” etc. I was kind of on eggshells in many interactions over things that noone would give a second thought to in the US.
(For context, I visited The Netherlands, Belgium, and France)