This isn't about war. This is the Taliban philosophy.
The Taliban and others of that kind were doing this kind of thing routinely long before 9/11. They did it when they controlled most of Afghanistan. It only made news when some humanist organization publicized it. This is how radical Islam will run things everywhere they get control, long after we are gone.
You will find a hundred stories about Americans patching up kids or even enemy soldiers. You will find none about the Taliban doing this. You never will.
What is your "first option" to deal with things like this?