What if the man was arrested and released because he did not actually try to commit the murder...yet. Then when he goes back on the streets he brutally kills you and your entire family.

You need to think about the big picture. Why do you want to wait around for Saddam to attack first. That is like walking down the street, someone takes a gun out, aims at you, you pull out your gun and wait until he shoots before you do. You cant shoot if you are dead. The example we set is a good one. That asshole in North Korea is probably about to shit his pants after he saw what we are capable of.