"I told the reporter that these so-called "peace protesters" were all incipient assassins. Free speech does not embrace any form of physical force, whether passive or active. A mob blocking the streets is using physical force and is not the same thing as protected free speech. People who are willing to resort to any form of physical force (because they are frustrated by the failure of their words to be effective) have progressed up the rungs of the ladder of violence. As each level of this ladder is climbed, history has shown that progressive degrees of physical violence fail to produce a desired political result, and it becomes easier to take the next step. At the top of this ladder is assassination. Cases in point: JFK, MLK, and RFK."