Survey after survey reflected a widespread conviction that extremism was the cause of Kennedy’s death. It was to this sentiment that Johnson spoke in his peroration: “Let us put an end to the teaching and the preaching of hate and evil and violence. Let us turn away from the fanatics of the far left and the far right, from the apostles of bitterness and bigotry, from those defiant of law and those who pour venom into our nation’s bloodstream.