Rather an ironic thing to say of the ultimate breakdown of civility between two parties.
Total war has no rules. A war with rules is less than a total war. Not that that's a bad thing. But it's an unsustainable thing.
War is hell, and only demons really want it. Best to get it over with quickly. Let's completely neutralize the threat in as prompt a fashion as we can manage, and then get on with our lives. And if the terrorists don't like it, well, they shouldn't have started it. So there.