Oh, I am sure that they believe it.
This is the way the United States fights wars--an enormous attempt to economize on its own soldiers' lives at the expense of noncombatants on the other side, a rapid slide from "we're at war with the dictator <name>" to "we're at war with a country <name>" and perhaps to "well it's those civilians' fault that we're bombing them: they should have found better political leaders."
As Woodrow Wilson said under somewhat similar circumstances, "we need to teach those Mexicans [Serbians] to elect good men"...
Brad DeLong