I actually don't really understand why there's some type of "rule" of war. It's WAR, following rules seems to make something inherently savage into something we

I actually don't really understand why there's some type of "rule" of war. It's WAR, following rules seems to make something inherently savage into something we can feel okay about because there appears to be some type of logic that makes it less horrifying than it really is. cup has a great point. We think that the Twin Towers were civilian targets but to those flying the planes, everyone in the West was probably fair game and the "enemy" even if we don't think so. Similarly, those people at weddings that were bombed probably thought they weren't fair game but we thought since they decided to host some terrorists at their wedding that they are complicit in their activities and thus are fair game. How do we classify "civilians" that may not be actively waging war but are part of the support network either through willful ignorance or by becoming human shields (like in Mogadishu, etc.)?