So what has the Israeli Slaughter of innocents taught us? It's taught us that you can ignore the Geneva Convention for example, so if you capture any service people, you can ignore the rules of law and torture and murder surrendered soldiers (America take note, you've been involved in more wars than any other country since WWII). It means you can destroy water, and all other utilities even if it causes the revival of old diseases. You can torture and murder civilians, you can use chemical weapons against civilians. You can steal land, property, destroy crops and livestock, destroy buildings & hospitals.
Those supporting Israels Palestinian Genocide should remember that you reap what you sow. You can't expect others to follow international law if you wont do so yourself. That genie is now well and truly out of the bottle. Well done America/UK/Australia/EU, etc.