I eat at Pakistani restaurants as many of my other Hindu friends do as well.. I never heard in my life anyone telling to not eat/drink from others on religious grounds, they did teach me the same on hygenic grounds though!! No one even in Hindu funded schools teaches the bigotry you are talking about. Btw, most of the Hindu workers in middle east are from Kerala and as far as i know, most of them eat all kinds of meats. Some of them may be vegetarians but their reason for not eating from others plate may be because you may be eating meat in that not because of your religion. Don't equate it with the bigotry that is mentioned in the OP.