This is an interesting take on 'nones'.  I have met a lot of nones is my lifetime, and I don't think it's all about libertarianism.  They just don't believe the Biblical literacy that is promoted by most mainstream religions and for obvious scientific reasons.  They also don't believe that we have any real clue as to the nature of God as we are finite human beings with limited perceptual abilities who most likely live in a multiverse.