I know I'm going to come over as a mealy-mouthed tosser here but I really don't get the hatred. Yes, I want us to win. Yes, I'd be very happy to see Portsmouth relegated. But I don't hate Portsmouth fans for being Portsmouth fans. They, like us, are just supporting their local club. We come from two fairly similar cities on the south coast of England. Both cities have their good and bad points. Coming from one doesn't make you superior over those coming from the other - except for the purposes of a joke.
Having said all that, I'll no doubt be joining in with "Who are you?" chants when we go two up in Sunday.