If Americans start to come to other countries and behave obnoxiously, those countries definitely have rights to kick them out and prevent any more americans from coming.
I believe you just described a good chunk of American tourists. :)
And a good chunk of all people, everywhere, for that matter.
On an individual level, not a lot. So it would be lazy to bake-in prejudice based on a single bad experience.
At the same time, prejudices (pre-judgements) of particular populations is common sense and statistically logical. For example, from a random pool of 1000 Swedes and 1000 Saudis you could guess with a fair deal of confidence which group has the more enlightened view on women's rights.
An interesting topic that tends to result in well reasoned, respectful, and enlightened points of view. /s