That is an interesting take.
I think the film does a good job of treating Darwin’s words fairly as well as showing how his ideas inspired the Nazis.
Did you see the film? Did you see what the woman who ran the memorial at the Nazi “hospital” said?
If you accept that Darwin's words inspired the Nazis, then would it not be just as valid to say that Christianity inspired the Nazis as well? See excerpt from Hitler speech:
http://www.freerepublic.com/focus/chat/2003002/posts?page=132#132