Collective punishment is a war crime. Having a 90% death rate being civilians is a war crime. Targeting hospitals, schools, water wells, aid trucks and bakeries is a war crime.

They said so themselves. The intent is ethnic cleansing. They have said as much that the goal is to depopulate the Gaza Strip. They have called Palestinians “human animals”.

“I have ordered a complete siege on the Gaza Strip. There will be no electricity, no food, no fuel, everything is closed,” Gallant says following an assessment at the IDF Southern Command in Beersheba.

“We are fighting human animals and we are acting accordingly,” he adds.

https://www.timesofisrael.com/liveblog_entry/defense-minister-announces-complete-siege-of-gaza-no-power-food-or-fuel/

It's almost like an occupied populace is in itself an inbuilt insurgency for the obvious reasons.

Oddly enough a lesson not learned from WW2.