On the other hand, if the government of the United States had been corrupt as say the government portrayed in "V for Vendetta" then the peaceful protest could have deteriorated into a mass genoicde. Neither side (the Federal Government or the Activitists) wanted bloodshed in that sitution and a peaceful solution was reached.
The problem is, as said before, sometimes violence is often only option because the enemy DOESN'T want a peaceful solution.