I think there are enough people trying to divide us these days without threads such as this.
I understand that xenophobia and setting in-group vs out-group boundaries are part of human nature, but they are hardly admirable characteristics. We should be trying to overcome these tendencies, we shouldn't be pandering to them. I suggest thinking of people, all people, as people. Personally I'm far from perfect at this, but it's amazing how much such a simple change can shift your attitudes.