Just how civilized are we?
I think if you seriously study humans, their history, and their emotional behaviour, you are forced to conclude we are a horribly violent, irrational and dangerous species. The very beginnings of our history are filled with murder and genocide - your relatives and mine killed every single last one of the neanderthals with their bare hands. This is what we are made of.
I see my American and English friends arguing over whose country harbours terrorists - does anyone know of a country, state or even a village that does not harbour someone who has committed unspeakable evil? It is a potential within us all. Look at the level of emotions that can rise on something as neutral as a scuba diving board, for heaven's sake. Just go to one of your kid's sporting events, and don't watch the game, watch the parents on the sidelines. Then give yourself a good look in the mirror, and think about what separates you and I from committing horrifying acts of violence.
It can be called the Thin Veneer of Civlization, or whatever you want - but it must be understood by all civilized men and women just how potentially dangerous all members of our species are, and how important the pact to abide by laws is.
Without a concious effort to restrain ourselves from our naturally violent tendencies, and to vigorously insist upon following the rules of civil behaviour, we are all doomed. Those who try to solve frustrating problems by acts of terror have to be universally ostracized and condemned. Whether acts of terror occur on "our" side, or on "their" side, it makes no difference - IRA, Protestant extremists, Hezbollah, Black Panthers or Ku Klux clan, or the radical Quebec separtists who kidnapped and murdered in the past - anyone who acts in this fashion must be dealt with without hesitation or doubt and with the greatest of resolve - because the danger within our species is so powerful, and so close to the surface.
Anyone who likes to pay a lot of money and go to a great deal of trouble to spend a few moments in the underwater world where there is no sympathy, no bilateral agreements, no peace treaties - just eat or be eaten - should have no trouble seeing the reality of this.