A person I talked to some days ago explained the behavior of the man who sent me massive threats over FB with these words: "He's protecting him mother." But that doesn't make sense to me. My mother would never expect me to send somebody death threats, no matter what happened. She is a noble character. I think a mother who expects her son to be an assassin is not worth of being protected. She should be left on a train station near the boxcars with a piece of cardboard around her neck saying: Free to good home.
Of course, this is just my own opinion.