I didn't understand the point of the secondary story about his son and wife. I understand it was meant to provide him with more of an intriguing character and to encourage the audience to react more strongly towards him however the film wasn't crafted through developed characters and that would be unnecessary. It intrigued people just because they were innocent humans and that is all that mattered (no further back story was required).
I just thought it made the film feel cheaper and more like a 'film' rather then completely absorbing me in the story.
I don't know, what are your opinions?