Give the lad a break. He lives in America iirc, so if he's never lived here and hasn't been exposed to kopites and their ways it's easy enough for him to dislike another club as much/more. I probably wouldn't understand some of the rivalries in American sport.
It's worth remembering a lot of people on forums have never even seen Everton live let alone met a real kopite. I'd rather fans like that than some fake hatred just to try and be in with the crowd.
Edit. Although he could do to knock the Chelski and Shite stuff on the head.