I don’t know about that. Sounds like he was pissed for all the right reasons.
The only thing I remember about Peter Fonda is him being in Easy Rider and then many years later, Ulee’s Gold. He never made headlines like his witch sister that I can recall so isn’t it possible that he isn’t an irrational, leftist maniac? His dim witted sister is still getting out and letting her commie colors show brightly. I just don’t remember Peter Fonda doing that.