With reference to Friedrich's Find and Replace exercise:

Communism was responsible for between 85 million and 100 million deaths in the century. In France, both sales and controversy were fueled, as Martin Malia notes in the foreword, by editor Courtois's specific comparison of communism's "class genocide" with Nazism's "race genocide."

Mentioned in various reviews of The Black Book of Communism: Crimes, Terrors, and Repression. Anyway, it's still OK to be prejudiced against the wealthy, because most of us would like their money.