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:

SYMHC Classics: COINTELPRO 1
39:12

Behind the Scenes Minis: It's Not Unprecedented
16:46

The Rendition of Anthony Burns, Part 2
43:32