ICJ orders Israel to prevent genocide in Gaza, stops short of ordering ceasefire

Perhaps I am unlearned in this area but I am unclear why the Jewish state, after its people experienced the atrocities of World War II, would act in this manner toward the Palestinians. Can anyone shed light on this? I understand completely the need to rid the world of Hamas terrorists, but in the process they have shown a reckless disregard (to put it mildly) for Palestinian people and their wellbeing.

In order to qualify for the protection of the rules of war, you must typically abide by them. This means that you don't get to prosecute when people kill your human shields or when they block humanitarian aid that you are stealing.