As always, Haneke refuses to make it easy. His study of violence offers no easy answers and no motivation for what we see. A family is held hostage and tortured by two young men in golf attire. We never find out why.
The intruders break the fourth wall and ask the viewer's opinion on their actions, making us complicit in what has happening. Interestingly, the only violence we really witness on screen is committed by the victims against the aggressors. As graphic as it is, the rest of the violence happens off screen.
Terrifying, thought-provoking and confrontational; this is extraordinary film making.