People tend to forget that Stephen Schwartz was a Communist. His first hand experiences with the Sandanista thugs turned him against Communism. When one reads Schwartz he does not sanitize leftist radicals.He points out that some sainted early labor figures were racist and corrupt.
Ducky on the other hand is an empty skull. He glosses over the crimes of marxists and attemps to remove such details as gulags, killing fields ect. He also wants you to be concerned about those Randoids. I am still looking for Randian Killing Fields and Gulags. Ducky also denies that Communist front groups exist.
The difference between Stephen Schwartz and the Duck is that Schwartz may be misguided but is an honest man. Ducky is Marxism with a smile so he will wish you good luck before he sends you to the gulag.