I did see a demonstration on Boston Common but they were weirdo hippies against the war itself.
I remember the riots at UCSB (Isla Vista) when they burned the Bank of America. My husband was a security policeman in Vietnam and a Policeman for the city when he returned. After the campus riots there were Union riots at BFI. My husband was hurt when he was one of 5 guys told to go in to quiet the crowd! LOL! 5 against hundreds proved to be real dumb. It was a bad time in our history and being spit on while in uniform (any uniform) wasn't surprising.
My husband still has a very old, dirty, tattered flag that he took from some hippies who were dishonoring it. I am not at all proud of a whole lot of our generation.