It appears that the screenwriters started with a list of the most deplorable acts imaginable and worked backwards in order to string them together into a coherent script. Then, they realized that there was no way their film would ever get released without being able to justify the content as a political allegory. If you believe the primary purpose of this movie is to provide insight into the plight of Serbians, you might as well believe The Human Centipede was created to encourage citizens of the United States to recycle their waste.