This is what we've come to call an Area Studies Fantasy, except the area in this case is suburban Atlanta. (You could say it's science fiction because it's meant to be set in the future, but in my book a post-apocalypse that sets everything back to 19th century technology and conveniently erases all world religions is a fantasy.) It's possible that familiarity breeds contempt, and we're more likely to object to the moral underpinnings of a book based on the mores of southern Protestants than we are on Buddhists or what have you, but even given that the execution here is a little shaky.