It ruins the whole viewing experience, because you stop buying what you see. Characters are just very obviously not believable anymore. People in present times still react strongly to people of different skin color if they are not used to seeing them. And I am supposed to just let it slide, that a group of illiterate people, whose access to media consists only of some paintings in church to illustrate the Latin sermon they cannot even understand, just did not react whatsoever to some obvious foreigner, who - by definition, not because of the skin color - could very likely have robbed and killed them?