Vandalism at draft board offices as U.S. involvement in Vietnam was escalating was deeply divisive. Opponents of the war were stereotyped as dirty hippies and sanctimonious white college kids, but the anti-Vietnam-war movement in the U.S. was really broad.
Research:

Behind the Scenes Minis: Bad Laws, Bad Cats
23:33

Carrington Event
43:31

United States v. Bhagat Singh Thind
46:30