“This tragic story underlines why it is necessary to kill and keep killing until no enemy combatants are still moving.”
The instant they drop their weapons and raise their hands they are POWs and killing them is indefensible.
don’t wait until they drop their weapons
They are aware of the kind of weakness you display, and that's why they typically kept stashes of weapons hoarded in various places, from on house to the next. They would fire until their clips were empty and then run - - unarmed and therefore not "legitimate targets" - - to the next house where they would grab fresh weapons and commence firing again at pursuers.
In other words, you are clueless and full of horse manure. We should take exactly as many prsioners as they take.