I've never read "Mein Kampf", but I can be reasonably assured that it's not a very good blueprint for building a democratic society. I've only read snippets of Michael Moore's books, but I'll bet they're all garbage like the snippets I read were. You don't necessarily have to put both hands in a stinking pile of manure to know that it's manure. Sometimes merely getting a good whiff is enough to deduce what it is.
Frankly, that's idiotic. Every educated adult should read even offensive works in order to have an informed opinion.
I've read Mein Kampf, though it was a long time ago. If it were still fresh in my memory, my perspective on the book would carry infinitely more weight than a second or third-hand condemnation. I do recall that the book was an utterly unreadable, meandering mess (the only reason it got published was because Hitler was already Chancellor, so every good Nazi had to read it). I also recall that it was all-too-clear about what Hitler intended to do to the Jews, so the only excuse the Germans could use to claim ignorance of the Holocaust would have to be that none of them ever bothered to read the book.
Similarly, I have seen Fahrenheit 9/11. I listened to Michael Moore's case. Thus, when I walked away saying that he had a point about Dubya's baffling blind spot for the Saudis but otherwise it was entirely composed of cheap shots and publicity stunts, that opinion carries much more weight than someone who only knows what he read in a conservative's review of the book.
Similarly here - conservatives live to be offended. There is a perpetual boycott against Hollywood in some circles. Well, I don't participate in that. If there is a movie that intrigues me, I will go see it and make up my own mind. What a partisan hack like Debbie Schlussel has to say about the movie is irrelevant to whether or not I will enjoy the story.
I catch myself typing "Michael Moore" when I'm talking about Alan Moore too. But seriously, if you like the graphic novel format at all, you're missing a treat by skipping classics like The Watchmen and V for Vendetta.