That is a load of utter rubbish. I am english - and my accent makes it pretty damn obvious - and having lived in scotland for the past 3 and a half years as well as currently being enrolled at edinburgh uni, I feel qualified to say that the scots are some of the friendliest people I have met anywhere in the world. I have had fewer problems here than in some parts of england where simply being from a different part of the country is sufficient to attract tirades of abuse.
The fact is that whilst there are ignorant individuals here as there are anywhere, on the whole I have found that edinburgh, and especially the university is a place where different cultures and backgrounds are accepted easily.