The major difference between Hitler and the Communist genocidal murderers -- Stalin, Mao and Pol Pot -- was what groups they chose for extermination.
For Hitler, first Jews and ultimately Slavs and other "non-Aryans" were declared the enemy and unworthy of life. For the Communists, the rich -- the bourgeoisie, land owners, and capitalists -- were labeled the enemy and regarded as unworthy of life.
Hitler mass-murdered on the basis of race, the Communists on the basis of class.
Because the Holocaust was unique in its industrialization of death and in its targeting of every Jew, including babies, for death, the post-World War II world has been rightly obsessed with eradicating racism (but not anti-Semitism!), i.e., the hatred of another solely because of race. But the world has not been obsessed with eradicating the other source of genocide: classism, or the hatred of others based on class.
The reason for this embrace is that class hatred is as fundamental to the left as the Trinity is to Christians, and the left dominates the media and education. This is dangerous because there is an ideological continuum from the democratic left to the Communist left. Making the rich into scapegoats for society's ills unites the left.
Read More: http://townhall.com/columnists/dennisprager/2011/10/18/why_is_class_hatred_morally_superior_to_race_hatred/page/full/