Israel (now broader Mid East discussion)

Right. But then we should be looking at international human law, and the principles of proportionality, distinction, and precaution, which are what - at least nominally - cover this. Which is more of an essay type question than it is a simple and very broad "what are they allowed to do," question.

As I'm not, hopefully understandably, going to write an essay on this myself, I'll link to one, from Médecins Sans Frontières: https://guide-humanitarian-law.org/content/article/3/proportionality/

To the point, and to address part of your comment, I would agree with the statement there that trying to use "the overall strategic objective of its war to globally justify the alleged proportionality of massive civilian deaths and destruction" is wrong.
Cool. I never actually expected your own personal treatise here on such a nuanced topic. But I've noted the previous links you've provided on this thread, and was looking for something along those lines on this topic, with openness to your own comments on such a linked reference. All, as previously stated, as additional grist for the mill.

There certainly was a reason that I originally quoted posts from the three people that I did. The side most opposite of you three is overrepresented, and too often simplemindedly so, in general media. In fairness though, the side opposite of that is overrepresented, and too often simplemindedly so, in the streets.