The Stalin regime murdered millions of people for reasons other than class. Stalin's man Lysenko led a campaign to exterminate geneticists because Mendelianism was thought to be racist and therefore to contradict Marxist-Leninist beliefs. Such eminent scientists Vavilov and Koltsov were liquidated in a purge of geneticists. An underestimated motive for Soviet mass murder was nationalism, when millions of people died during the man-made famine in Ukraine and during the forced relocation of national minorities within the USSR. These campaigns were often conducted in the name of anti-racism. Intellectuals don't need racist theory to support democidal policies.