on the mistaken belief (long past) that they would bring prosperity to the people of Gaza. The US also funded them via the UN and muslims world-wide started funding them when they demonstrated their ability to supply dead infants upon which shit like you could dance. That funding is called ZAKAT
Saudi Arabia took a stand against zakat for terrorism 20 years ago.
Why does Israel want commerce or diplomatic relations with Saudi Arabia or any Arab countries? They've hated Arabs forever.