You can get fans of any team from any walk of life.
This only becomes rather comical cause the boy is an american with a family which is obvious very full of its apparantly British/Northern Irish history.
Just having a Northern Irish flag doesn't make you a loyalist, should have been the boys reply, as opposed to "I'd never fly the tri-colour." But hey I guess he really is a loyalist, and he says himself he only supports the team because they are popular where he lives.