It's just a shirt at the end of the day. I'd do it no problem. In fact I don't truely hate anyone. The Derby day is good fun and nice to get bragging rights over our closest rivals but anyone who truely hates Derby needs more important things to worry about in life.
There are clubs I don't like, like Liverpool, Leeds, Man Utd, Wigan and Sheffield Utd but the only club I have any strong feelings about are Forest.
The two greatest icons of our club are Stuart Pearce and Brian Clough. Clough managed Derby and Pearce pulled on a Derby shirt for a charity match.