Heh, I remember being a teenager and thinking 'man, all my classmates are dicks,' It took me a while to realise that I was being just as much of a dick, just in a different way.
In other words, I was the typical teenager, and thinking myself above my peers didn't in any way correspond to making myself better. Everyone is arrogant as a teenager, they just don't realise it. A lot of people go on to be arrogant as adults, but hey, at least nowadays I acknowledge my arrogance.
So yeah, I used to, then I grew up, matured properly instead of the faux maturity I had, and realised that there's no point to really hating anyone unless they give you real reason. Hate is a word that gets thrown around a little too often these days, save it for someone who deserves it.