Thornton portrays a man whose apparent stupidity masks a deeper understanding of morals and circumstance than the common man. Everyone treats him as, and calls him, a "retard", yet he sits in his own presence watching and learning...taking in his surroundings to figure out who is decent, and who isnn't. He just wants to get on with his life, yet, he befriends a young boy by happenstance who he can relate to through common toils and emotion, who he can share his innermost thoughts and dark history with, and who he can - within his own diminished capacity- protect in full with his own paternal....no fraternal....regards.
This movie will make you laugh, it will make you cry, it will make you cringe. But it won't let you go until you see it in its entirety, and question the fact - is it okay to kill if it's for a better cause?