I don't get that - people going to war over religion. I don't know, I could see going to war over justice or democracy or even revenge. But if you're going to war over religion, now you're just killing people in an argument over who has the better imaginary friend.
Religious war at its simplest is killing each other over who has the best imaginary friend.
If you're going to war over religion, now you're just getting into a fight over who has the better imaginary friend.