this whole war is based on religions

Not entirely, there is a lot of geopolitical power struggle there as well. Israel was born as a "western puppet" that soon grew and became "too important to abandon". Without it, the arab nations would be more likely to ignore whatever the western powers demand, as they'd have a hard time reaching them. With Israel, it's like a gun's permanently pointed at them and "any funny business" against them means you also have to deal with USA