Another vote from a cradle Catholic who was not remotely offended by this movie. Not that some of the negatives mentioned by other posters here aren't true -- yes, a lot of the humor is gross, yes, the F-word is overused, yes, its criticism of organized religion is less stinging that you'd expect (though that in itself is a slightly foolish expectation, given that the writer/director is himself an active member of an organized religion). And yes, if you're not Catholic, much of the movie is a little foggy, under-explained, and not very engaging. That last one I definitely agree with; I seriously doubt whether I'd recommend the film to a non-Catholic at all.
But, oh, God, I LOVED it, serious flaws and all! It's a huge chaotic mess with about sixty different trains of thought and philosophy, from the ecstatic to the scatological, slugging it out for dominance, and in its very sloppiness there's a sense of anarchic, exultant wonder I've never seen in a movie before. The only two things like it that I can think of are Thornton Wilder's play "Skin of Our Teeth" and G.K. Chesterton's amazing joyous fever dream of a novel "The Man Who Was Thursday", both of which are works by people who may or may not have faith but who definitely have a good idea. Or several dozen of them, and who just run with them wherever they go. These works are big chaotic messes, but in that way they are mirrors of Creation, the mother of all big chaotic messes. In all these works, just as in the real world, love and joy and beauty and filth and cruelty and despair are constantly tumbling over and bleeding into each other; the one universal rule is that everything is absurd, that the human race is the most absurd thing of all, and that this absurdity can be the catalyst to either suffocating grief or a kind of hilarious wonder.
If you go into "Dogma" expecting a trim and tidy theological comedy of manners, you'll be sorely disappointed. If you're looking for something with the same filthy gorgeous lunacy of existence itself, this is it.
