He was referring to the American citizens that didn’t participate in the protests against the Vietnam War
The Declaration of Independence is named the Declaration of Independence because it is when the 13 colonies wrote their grievances to Great Britain and stated they will be separated from Britain's rule and be their own nation.
It shows that people will listen to authority to extreme extents it’s a part of social culture we are told to obey authority so we do. Even if it means hurting other people bc they told us to and we should listen to them
