In situations like this I'm always reminded of the time, in my youth, when a friend, whose parents were East Indian, and I were walking along the road when a group of yobbos yelled, at my friend, the old "GO BACK WHERE YA CAME FROM!" To which my friend replied to me, in a stage whisper "Oh are they going to me me bus fare back to Erdington, then?" We were in Handsworth, the area of Birmingham I lived in at the time :-D