Civilized? Most people who deserve killing, are not civilized at all and the places you mentioned do not have anywhere close to the crime we have here. Watching that head roll with the eyes still blinking in shock, is a pretty good deterrent.
Trouble is, liberals talk about punishment, but they have no stomach for it. They prefer a sanitized view of the world, like the dopes who sanitized the Holocaust camps. Lethal injections are as dumb as it gets and Tinker Bell liberals turn my stomach!