I was only 3 years old in 1970 when this happened but after listening to the statements of the "citizens on the street" and statements (at the time) of students' family members regarding the protesters in this video, wow, it is really hard to swallow that other US citizens were endorsing the shooting of other US citizens, just like the trolls on Twitter were/are doing regarding certain events.
http://youtu.be/sRJaPmV-rG0?t=36m47s
I love researching the culture/era of the 60s/70s, and the tragic events just a few days later at Jackson State along with the events at Kent State, really put a strong sociological perspective on how attitudes were back then. A fascinating turbulent era.