That's a thorny ethical question, but it's not really relevant to what the IDF has apparently been doing. The article says they like to grab random nearby civilians and force them to do things like remove suspected IEDs and, literally, stand in front of Israeli soldiers in a firefight in hopes that the enemy will hesitate (they often don't). It's not just a few psychos; the IDF as a whole is claiming in court that they have a right to use random bystanders as ablative armor. That's unequivocally evil.