Anti-aircraft weapons are inherently dangerous to the cities they protect. Shells are fired upward and many follow a ballistic path back down to earth, missiles

Anti-aircraft weapons are inherently dangerous to the cities they protect. Shells are fired upward and many follow a ballistic path back down to earth, missiles are fired and quite often miss. Successfully deployed weapons cause airplanes, and all their fuel and ordnance, to fall out of the sky onto the landscape below. All of this is understood by the militaries who rely on these weapons. These are just the basic facts. No special expertise needed, of the sort the "I can tell what kind of missile this was by observing the smoke it makes" guy must possess. Shifting moral responsibility for collateral damage from the aggressor to the defender based on the limitations of the defender's arsenal does not seem right.