One would think this would be an impossible movie to make...and almost impossible to watch.
But I've seen the previews here in Germany...and its almost as good as Charlie Chaplins effort in the 1940 movie "The Great Dictator". This movie is almost like taking Larry, Curly and Moe....and injecting them into Nazi Germany of 1944. Of the six clips I've seen...Hitler appears the fool in each clip and they have you laughing.
A number of older Germans in the past 20 years have openly commented that in their youth of the 1930s...they really couldn't understand this national trend to follow Hitler blindly...that he often appeared like a fool in the speeches and the movies that came to every town's theater. The movie simply takes the next step.
I'll even add...this might make it to the Oscar list of 2008.
I think it is healthy to make fun of bad people up to a point. It is a mistake to give Hitler a super-human image because he did so much that was evil (although he was a super-villain). On the other hand, it would be wrong to trivialize the NS era (I am not suggesting that the movie trivializes it). The Nazi leadership was the world's ugliest freak show so satire is not out of place as long as people remember the real history.
If you haven't seen it, get a copy of Mel Brooks' "The Producers" where the main characters put on a play entitled "Springtime for Hitler." It's in the same hilarious mode.