“The difficult decisions first began in December 1964, when I refused to join a Progress Labor Party group preparing to go ‘underground.’ They ended with the most difficult choice—to leave the movement silently, quietly, as so many other had done before, or to risk the censure of those who had once been my friends and tell of the personal experience, political truths, and illegal activities that forced me to ‘split.’ The friends who were no longer friendly, the attempts at personal slander, the chorus that now sang out my name as the most dangerous enemy of all, the attempts to isolate me—all were expected. But the contemptuous and defamatory quality of the attacks were not, and the only thing one can say is that the Old and New Left have this something in common—they have no scruples when it comes to one who sways from their prescribed faith.”

Source: The New Left: The Resurgence of Radicalism Among American Students (1966), p. 3