Anti-Semitism was rife in almost all varieties of socialism. - Sidney Hook

To silence criticism is to silence freedom.

The grim consequences of … Hanoi's victory are now incontestable. The record of the last decade has brought a realization to some, who had been of the same view as Chomsky, of what they helped to bring into being in Vietnam. Protests have been organized against the continued existence of concentration and re-education camps, and the systematic barbarities practiced against dissenters. But Chomsky is still unrepentant. He has refused to join any protest, on the ground that it would serve the interests of the United States. In short, he has followed the double standard to the last, for he never hesitated to utter the most extravagant criticism of the United States on the ground that it would serve the interests of the Soviet Union.

Although there was much to criticize in American domestic and foreign policy, what struck me was the one-sidedness, unfairness, and systematic use of the double standard in the attacks against the United States and South Vietnam. … He called upon the United States "to denazify itself," but not North Vietnam or China. What practices in the United States, compared to the barbarous practices of Cuba or of China or of North Vietnam, warrant such a characterization? In those countries how long would one survive who whispered the kind of criticisms Chomsky was perfectly free to broadcast in the United States and be rewarded for it?