人之怒

To talk about this movie，I must admire that it is a good one.
I have to say this movie's play used a lot of western classic literature rules. For example,who made the boy's death?Considering this question carefully and then we will find the answer is his father.
So--what did the writer want to show?
In the classic literature like ancient Greece drama,people/character usually cannot defeat one thing that named FATE,so the man who is very successful but still can't help his only son's terrible event.Besides at the last he decided to fight for his poor child--from here we should ask a question:
WHO SHOULD BE BLAMED?
There isn't a perfect answer.
In addition,this exactly is the fantastic part here.