A lesson all British 5 year olds learn.
"Sticks and stones may break my bones but words will never hurt me"
If you take away the racists words from him/her they have nothing to abuse you with.
For eg. I was in a pub in manchester once celebrating something or other, and these rowdy (utd fans) blokes were making a fuss but nothing too bad.
Next thing this really black dude comes in, black as in Jamaican or west indian you know what I mean.
One of the blokes, obviously spurred on by his mates told him to "[Poor language removed] off back to your own country you [Poor language removed]"
The man cooly turned round and said, Actually mate, this [Poor language removed] was born in sheffield.
Never seen 6 rowdy blokes go quiet so quickly, [Poor language removed] hilarious.