Look at what Aleksandr Solzhenitsyn wrote in The Gulag Archipelago about a “useful idiot” judge:
Oh, “what an intelligent, farsighted humane administration from top to bottom,” as Supreme Court Judge Leibowitz of New York State wrote in Life magazine, after having visited Gulag. “In serving out his term of punishment the prisoner retains a feeling of dignity.” This is what he comprehended and saw.
The Gulag Archipelago, Volume 2, p 147