. . . except the part about Catcher in the Rye, which I think holds up pretty well provided it's read as a portrait of adolescence (and an exploration of some of the aspects of adolescence worth keeping). Then again, I always preferred Franny and Zooey.
That said, I'm not sure that what Cohen is pointing out is the hypocrisy of social niceties. It seems to me that what makes a lot of what he does funny is the way that people, even when trying to be nice, manage to betray their phobias and prejudices anyway.
Also, while I think civility is certainly the glue that holds society together, I think that transgression is the glue that holds art and entertainment together. Oh, there might be some good pro-civility art out there--Lewis Carroll portraying Alice's Victorian propriety as heroic comes to mind (though it's worth noting that this came from the pen of a suspected child pornographer), and there's always the dry-but-essential Greek tragedies--but generally, that which entertains or edifies us (and the line between the two is thinner than anyone likes to acknowledge) is that which allows us to escape the rigors of civility for an hour or three.
All that said, I'll probably wait 'til Bruno comes out on DVD, simply because there's no compelling reason to pay to see it on the big screen. Moon, with Sam Rockwell, and The Hurt Locker are both higher up on my moviegoing queue.