Why do a lot of people on veganpeople have to preface everything with "I'm not a hippie." -or- "I hate hippies."

What's so fuckin wrong with being a hippie?!

I listen to Jam Bands and The Grateful Dead. I don't smoke MJ but have no problem with those who do. I'm a vegan, buy organic, am spiritual, hate shoes, love granola, don't wear deoderant, hug trees and love animals.

For all intents and purposes, I'm a neo-hippie. So what the hell is everyones problem? What is so wrong with that?