Let me put in my two cents.
1. He may not have read the front page of SMS. Give him some leeway.
2. While I dont agree with saying slurs, let it be known that the r slur was thrown all the time in the past years. It's only as of late its considered a slur. Which is curious to me. (I still dont like it being used tho, so please attempt to keep it out of this place.)