Religion as a Basis of Lawmaking?

UPDATE:  I've corrected the link.  (Thanks to Chris Green, Ole Miss.)

I am in substantial agreement with Steve Shiffrin's position on this issue.  I present and defend my position here.

Kent Greenawalt defends essentially the same position in his recent book on the establishment clause.

If anyone thinks that my argument misfires, I'd love to hear where and why it misfires.