After he kicked his dog (not much of a spoiler alert as it happened in first 5 minutes) cowardly me almost turned it off but did not. Glad I weathered it as it was the best film I have seen in ages. Hard to watch? Oh yes but the why are we so angry question may be somewhat explained, it sure shows us the true suffering of our fellow humans and how we aid and abet that suffering. I was rather gladdened by the surprise climax and am not sure I should be proud of that. No more spoilers. Just watch!