It's been a while since I read Demon Haunted World, but I'm pretty sure that the Dragon wasn't even supposed to specifically be a metaphor for God. Instead, it

It's been a while since I read Demon Haunted World, but I'm pretty sure that the Dragon wasn't even supposed to specifically be a metaphor for God. Instead, it was supposed to be a metaphor for all supernatural claims. In particular, Sagan had previously spent a large amount of time in the earlier parts of the book discussing claims of alien abductions, and relating them to historical cases of "demonic possession". While this story can certainly be used as a metaphor for God, I believe that focusing on that misses the overall point of the story.