That's right. And yet there are a bunch of folks out howling for blood, based on little more than their own emotional response to the actions of a small number of vermin. It's a bad idea to trust people who call for blood when they do not know what's really going on -- it's hard to tell the difference between such people, and the people they want to kill.
More to the point, there are no practical arguments in favor of widespread destruction of Iraqi cities (even the best of them -- "it'll make 'em respect us" -- is fantasy, and wholly impractical besides), and plenty of arguments against it.