Fuel absolutly helps to kill more people. And wounded soldiers are allowed medical help but those medicines were for the civilians.

People tends to forgget that countries are not people with emotions or capacity for decision making.

They are agruparions of people with motivations and ways of thinking highly variants. There are israely people who wants ro lever Palestine? Sure, but there is people who want peace too. At least one of the Hamas atack was pro Palestine. Same with Iran.

The necesities of juggling so many conlicting ideologies make decions way less fast, optimal or consistent that people are comfortable to asume.