"Nothing to kill or die for. And all religion is true." -- Well that's something to kill and die for.
Come on we don't have much in the way of popular works. Imagine is the only really popularly atheistic song. Just as Emperors new clothes is the only really popular skeptical story. It's just kind of a dick move to don a fur coat and expensive jewelry and make Imagine a pro-religion song. You might as well rewrite the Emperors New Clothes to be a story about the virtues of faith.