"God Bless America" is good, but for a reason many people will either find strange or disagree with entirely: It's a movie that needs to be there.
As some other reviewers have noted, "God Bless America" is more of a rant than a movie, but the ranting is the reason for the movie to exist. It's a statement embedded in good acting and pretty cinematography.
It features a plotline that is by no means wholly believeable (that never stopped anyone from making an episode of The Mentalist) and it is nothing *like* entirely pleasant (that never stopped anyone from watching an episode of The Mentalist) in which two alienated loners, a divorced middle-aged man and a too-clever teenaged girl, find one another and go on a killing spree that features representations from a rogue's gallery of American incivlity and mental degeneration; one that includes, among others, a Glenn Beck clone, a "God-hates-gays" preacher and a large sampling of the superficial, the cruel, the entitled and the merely rude.
It is a rant wrapped in a thin layer of movie that displays a very linnear, paint-by-the-numbers plot, the point of which makes the movie almost like something Brecht might have written were he alive today. Goldthwaite's story and how he tells it, like Brecht's, pushes the viewer back far enough to see the point: that we are so bombarded by multimillionaire media personalities vomiting nonsense, dwarf-tossers, infinitely entitled celebrities and the people who have given us the worst of YouTube, that our world is riddled by a media-fueled cancer of noise in which each tumor of diseased culture is replaced by the next one so quickly that horrible events driven by horrible people have become our norm and we cease to notice the presence of the disease, that things were ever otherwise, or to imagine that anything else is possible.
"God Bless America" is a black comedy that at times is not entirely funny, but that is nevertheless worth watching for its point.
If it *was* entirely funny, it would be part of the problem.