Big Bad Wolves is a brilliant movie, told in a darkly funny way that is both entertaining as hell and immensely uncomfortable. How can they tell this story of a father torturing the man who brutally raped, tortured and murdered his daughter and make me laugh about it? But I'll be goddamned if the tone isn't spot-on the whole way through, often leading the viewer into a false sense of security about what they might see. The title of the film immediately puts you in the frame of mind to see this whole thing as a fairy tale - and indeed there are a few fairy tale references thrown in there - and what are fairy tales but morality tales? This tale is of course a look at vigilante justice and the rights and wrongs of it, told in a way that makes you continually change your morals until you end movie maybe not knowing what to think at all.
Throughout all this, you think that the humorous nature of the film is setting you up for a nice, juicy, satisfying ending with everything turning out the way you want it to. One of the things that I both loved and hated about the movie is that it does not do this at all. The last plot twist has you tense with anticipation to see it all work out, but as events quickly go downhill, the audience ends up being left with nothing more than a final shot that will absolutely crush your hope and your soul. I actually found myself yelling at the TV, "You sons of bitches! You can't end the movie like that!" But of course, they can end the movie like that, and that is perhaps the most right ending for this tale. I don't want to make assumptions about the filmmakers' intentions without knowing for sure, but it does seem like their message is decidedly against the idea of vigilantism, in effect saying that no matter how right it may feel, it's always wrong in the end for all involved.
I could spend many more paragraphs gushing over Big Bad Wolves but the only thing that will convince you of its greatness is to see it yourself. Again, a masterpiece of filmmaking from beginning to end, Big Bad Wolves will have you literally entranced and so invested in the story that what you see will make you keep thinking about it for days afterward.