Since everyone seems to be talking about Bill Ayers and the Weatherman Underground here is a short trailer from the 2002 film "The Weather Underground."
Here is a quote from a Black Panther during the time the Weatherman Underground was active:
We believe that the Weatherman action is anarchistic, opportunistic, individualistic, chauvinistic, it's Custeristic. And that's the bad part about it. It's Custeristic in that its leaders take people into situations where people can be massacred. And they call that a revolution? It's nothing but child's play. We think these people may be sincere but they are misguided, they're muddle heads and they're scatter brains.
You can see the entire documentary here and order it here at PBS.