I'm curious. This is a question that's plagued me my entire adult life. Why are many people against being called "those people" or "these people"? Is it a conno

I'm curious. This is a question that's plagued me my entire adult life. Why are many people against being called "those people" or "these people"? Is it a connotation thing---as in previously someone trying to marginalize a population would refer to them casually as "those people"? Or is there some deeper insult that I am missing due to not having experience of it?