There's absolutely NOTHING to indicate that if the group was infiltrated by policing agents, that those agents did anything to incite any type of violence.
I doubt the Weathermen were the only radical group that were NOT infiltrated. Every other group at the time, even those less high profile, were systematically infiltrated.
Let me explian something for purely elucidatory purposes, France is the capital of protest.
The French often have millions of people on the street protesting their very far left, very socialist, very radical agenda: they are anti-rich, anti-government, anti-establishment, anti-corporations, anti-everything capitalist really, and it happens just about whenever they feel like it.
Yet the French practically NEVER have any violence during such protests; practically never have any property damage... all very civilised really.
Yet every time a lare group protests a government with a history of justifyng severe reactionary crackdowns by means of
agent provocateurs, suddenly these organised unidentified militants appear and quickly escalate the situation; forcing a police reaction.
A good example is the current crop of hooded/masked exceedingly confrontational protestors wearing the exact same military issue boots as the riot police at the G20 and G8 meetings.
Why are only the American and British anti-gobalization protestors so violent? CIA and MI5 perhaps?
Think about that in terms of the Weather Underground... who was doing all this illegal wire-tapping; mail interception etc etc... infiltrators perhaps?
The Luke