One could ask the same about authoritarian sectors of the Left.
>From a liberal see, "The Dark Side of the Left: Illiberal
Egalitarianism in America, " by Richard J. Ellis, Univ. Press of
Kansas and from neo-con Paul Hollander, "The End of Committment:
Intellectuals, Revolutionaries and Political Morality in the 20th
Century."
Both books full of illuminating autobiographical accts. by Communists and ex-Communists from the USA, Vietnam, fSU, PRC, Cuba, Poland.
-- Michael Pugliese