Commies as bad as Nazis?

Commies as bad as Nazis?

Will Communist sympathizers be judged by the same light as Nazi holocaust deniers? Robert Conquest calculated that communists slaughtered 100 million people in the 20th century. The Nazis were pikers by comparison.
Michael Ibarra asks if communist sympathizers deserve the same approbrium as those who deny the holocaust.
I've wondered the same thing myself.