OK. This movie is about how the scientific establishment has ‘mccarthy’d’ those who do not follow the party (evolution) line. This is something its supporters say routinely, that it really isn’t about knocking down the ToE, or trying to bolster support for ID, it’s about how the scientific establishment treats its renegades.
Do I have that right?
If that is correct, can anyone explain the foray into Nazis and Eugenics and the attempt at linking the two with Darwin? How does that help making the point of the movie?
Easy.
Smear Darwin using guilt by association, no matter how tenuous, and you combat the theory of evolution.
They are forced to use these tactics because they have neither the scientific training, nor the evidence, to combat the theory of evolution in scientific venues.
(It's the Goebbels approach.)