In the art school there were all the conventional unconventionals--long-haired men, short-haired women, both at the time considered to be shocking and delighting in it. They were all interested in ideas more than in things, and most of them were kind, provided that they were not asked to be kind to someone who was obviously not one of themselves. Then they were like wild birds pecking a caged one to death.

(from A Rocking-Horse Catholic)

I wouldn't have said anything quite as harsh as that last sentence about my hippie days, but I certainly saw that tendency. There was a Manichean divide between the hip and the straight, the children of light and the children of darkness. But as soon as a group of people set themselves up as being more tolerant than others,  they naturally tend to become hostile to those whom they believe to be less tolerant. Some of my liberal acquaintances are shockingly vicious about, e.g., the Tea Party. You can only be tolerant by being tolerant, not by joining a group that advertises its tolerance.

T-Bone Burnett has an amusing song called "Trap Door" about this syndrome. Haven't heard it for a while so I can't quote it exactly, but it has lines like "When you think you're humble, you're no longer humble--watch out for the trap door."

And of course "shocking and delighting in it" is a perennial pattern among the conventional unconventionals.