I think the criteria on which such a decision is made is definitely not based on nationality. When choosing someone to share your accommodation with it should be based on values such as tidiness, organized or not, cleanliness, honesty. Just because two people share the same personality does not mean that they are compatible or share the same values.

To believe that your fellow kinsman is more compatible with you because you share a nationality is just ridiculous.

If I had issues with foreigners I wouldn't have decided to live in a foreign country.