This is the kind of scene that I think Dante would write about if he were alive today:
Demon1: Hitler is far worse than Stalin.
Demon2: No, no-Stalin all the way.
1: But Hitler killed all the Jews.
2: Yeah, well--you know what we think of Jews around here. And Stalin was a communist.
1: Compared to a Nazi?
2: You know how Americans feels about communists.
1: Since when do they get to judge?
2: Just ask them.
1: True enough.
2: Communist, case closed.
1: But 6 million Jews....10-12 million overall.
2: Communist.
1: Sigh...
2: You know I'm right.
1: OK--but how many Stalins can dance on the head if a pin?
As for the Guderian business, here's one book that refutes what Guderian said in Panzer Leader pretty convincingly:
http://www.ihr.org/jhr/v02/v02p375_Lutton.htmlForget Communism, the man is responsible for the deaths of at least 10-20 million people.