Contemporary left-wing antizionist discourse reproduces with stunning fidelity some of the central tropes of Soviet antizionist propaganda, which demonized Israel and Zionism. The article explores the background of these tropes, looks at the biographies of the right- wing Soviet ideologues who developed them, and examines the mechanisms through which they reached the West. The article concludes that these tropes are inextricably linked to antisemitic conspiracy theory, containing seeds of anti-Jewish violence that we ignore at our own peril.