It sounds like the Israelis have never heard of nor adopted the concept of ROE (Rules Of Engagement). If the Israelis did have Rules Of Engagement, they might have been ignored or they might have been so simplistic that anything goes. I'm guessing it is the latter based upon incidents such as the ones posted by Banquo's Ghost.

Do Israeli Rules Of Engagement exist or not?
Are civilians fair targets for Israeli soldiers or not?