Wars are faught for political and economic resources, and cause religion, because the victor has written history since the first battles between equally superstitious primitive peoples. Since war causes religion, religion does not cause war. But religion is used to ignite the people to sustain the battle for political and economic resource. Without "divinity" religion, leaders would use secular nationalism to get the same effect. Wiping out religion will not wipe out war, because religion is not the cause of war. The WTS uses religion for control of political and economic resources, so does the Taliban, so did the Inquisition, so does the IRA, so does the PLO. Hitler used a secular substitute and look at the greater, more carnal, more nihilistic damage. Wiping out religion would leave nihilistic nationalism. Religions, left to their own devices, do not cause strife (they all have the same principle commandments), but are convenient fault lines for politics.