... Many of us were convinced that Nixon was going to impose martial law. Thankfully, it did not happen.
Had we shot the Guardsmen, we would not have been defending against tyranny - we would have killed a bunch of people who were being used by Jim Rhodes to make him look big and bad, so he could get a cushy job in D.C.
I expect that most other situations in the past century would be viewed in a similar light.
"Democracy is two wolves and a sheep, voting on what to eat for dinner; Liberty is a well-armed sheep contesting the vote." (B. Franklin)