Many homosexuals were drawn to the promise of Marxism. There was a certain tolerance and even gay liberation in the early years of the Soviet Union, before homosexuality was re-criminalized in 1933 and the community went back underground. "Gay Soviet history almost doesn’t exist," said Fiks, sitting at a desk in New York’s Winkleman Gallery on a windy Sunday in February. "The older generation didn’t do a lot of talking." Fiks plucked the title for his exhibit, "Homosexuality Is Stalin’s Atom Bomb to Destroy America," from a 1953 article by Cold War pundit Arthur Guy Matthews. "In the U.S., I...