It didn't shock me enough. I don't know why. Maybe because we have known such savagery. Uganda, Afghanistan, Sri Lanka. Kids carry guns, They shoot.
The chase at the end was nerve wracking. And I did want Ralph to kill Jack. After all he was the voice of reason, like so often I am screaming out, this is what is right, and no one around seems to understand.
Savagery is so common in everyday life. When threatened, all baser instincts emerge, to hurt, to malice, to lash out. Civilization is then, only a false veneer.
We don't say, "Kill the beast! Cut his throat! Spill his blood!" but we wish it all the same.
Ps - For example I would like to kill my boss.