The film is very powerful. Since I am Bulgarian, neighboring Serbia, I can definitely relate to what Serbian Film ultimately says. I suspect one would understand the movie far better if born on the Balkans. It is easily marginalized as gore or snuff, but I maintain that there is very little, if any, gratuitous violence in it. There is an understated social commentary throughout the movie, including behind every concept and act of violence. For example:
Cheating war vet's wife: illustrates how the regime's warmongering decisions affect families
Baby Porn: The system fucking over the children of Serbia, leaving them no future
The rape scene at the end: brother vs brother (Yugoslavia's story), the robbing of any dignity, the inevitable violent revolt of the oppressed vs the oppressors
Suicide in the end: a family killed, salvaging its dignity through death
The mysterious man and his bodyguards at the end: illustrates how those really in charge at the highest level of these horrors ultimately escape justice
I saw it twice, can't watch it again for sure. I recommend not watching it with a female or if you are one (with some exceptions

).