ABCNEWS obtained a copy of an unpublished book proposal with quotes from a verbatim transcript of an interview Schwarzenegger gave in 1975 while making the film Pumping Iron.
Asked who his heroes are, he answered, "I admired Hitler, for instance, because he came from being a little man with almost no formal education, up to power. I admire him for being such a good public speaker and for what he did with it." [emphasis mine]
He is quoted as saying he wished he could have an experience, "like Hitler in the Nuremberg stadium. And have all those people scream at you and just being total agreement whatever you say."
From here, via Media Whores Online.