Zane Curtis said:
It doesn't hurt, either, that he taps into a body of mythology that lots of people are already interested in.
That's one way to put it. Here's the basic list of objections:
1. Bad history.
2. Bad art history, bad religious history, bad theology, bad textual scholarship, bad bad bad all over.
3. Stupid use of cryptology.
4. Extremely offensive religious bigotry.
5. Claiming a wholly unjustified degree of factuality.
6. Thanking respectable sources in the frontmatter while listing highly dubious sources in his website bibliography.
7. Knowing better and doing it anyway.
8. Making Sandra Miesel semi-famous.
Dan Brown didn't so much research as plunder
Holy Blood, Holy Grail (Dell, 1982), a theoretically nonfictional book which combined clever but hardly ground-breaking research with some judicious speculation to put forward a theory which I doubt the book's own authors entirely believed.
What
Holy Blood, Holy Grail actually demonstrated is that over the last century or so (it's hard to date this, because recent believers
forged documentation and planted it in research libraries), some people in France
have believed that the Merovingian dynasty was descended from Mary Magdalene and Jesus -- which is, you will note, a very far cry indeed from demonstrating that the Merovings
were descended from JC and MM.
To put that claim in perspective, the earliest chroniclers of the Merovingians, who at the time they were writing were a millennium-plus closer to their subject, said that the supernatural ancestor claimed by the Merovingians was a sea-monster. Apparently it was a well-known anecdote at the time. There was this ruler named Chlodio or Cloio, the son of Faramond or Faramund. One day when Chlodio and his wife went swimming, she was molested by a "Quinotaur," a variety of sea-monster. She subsequently gave birth to a son named Merovech or Merovee or Meroveus, who founded the Merovingian dynasty. The story is obviously your basic heathen kingship cult claiming a god-like origin for their founder, like Romulus and Remus being fostered by a wolf, or the emperors of Japan being descended from the goddess Amaterasu.
I have nothing against ancient heathen kingship cults
per se, but when you're talking about a dynasty that was supposedly Christian in every possible sense of the word, claiming descent from a sea-monster would be a very odd thing for them to do. It's also hard to believe that no one so much as hinted at the JC/MM aspect of the Merovingians' divine descent at the time that their dynasty was being deposed on grounds of obvious incapacity, and the Carolingians installed in their place.
Short version? The Priory of Sion/
Holy Blood, Holy Grail claim is a load of codswallop. Furthermore, it's known to be a load of codswallop -- as in, the parties responsible have admitted to forging the documents and sneaking them into libraries. Anyone who does real research on the subject has to know that. Dan Brown absolutely has to know that.
I very much blame Dan Brown for making his story-boosting research and sources sound vastly more significant than they were, and for not mentioning the admissions of forgery. It was a piece of vanity on his part, unnecessary for the telling of the story, and it caused a great many people to conceive false impressions of the matter. In fact, his research leaned heavily on a bunch of newage woo-woos. You can find the whole thing
discussed here.
But that's only part of it. Dan Brown plundered two other related bodies of mythology. One is gnostic, pseudo-gnostic, semi-gnostic, neo-gnostic, and wishful-thinking-gnostic speculations. That's an ancient can of worms which has been repeatedly added to by worm enthusiasts. You can claim
anything about gnosticism, because there's very little that some gnostic somewhere hasn't said or implied. In the meantime, it'll give your work that intoxicating whiff of ancient secret knowledge.
The third source, which many of you will have encountered without identifying it as a body of mythology, is anti-Catholicism. It exists. Not everything that gets called anti-Catholicism is part of that mythology, but there are definitely mythologies of anti-Catholicism. If you don't believe me, try typing
isis nimrod babylon into Google and looking at
what turns up. That's only one branch of it.
Here's another. There are lots more.
Traditional anti-Catholicism is where Dan Brown got all that crap about the church conducting a centuries-long campaign of systematically suppressing and altering scriptural texts. It's an old libel. If you're Jewish, it may help you understand some of the reactions to
The Da Vinci Code if you imagine a bestselling thriller which assumes there's a factual basis to
The Protocols of the Learned Elders of Zion. If you're Mormon, imagine a bestseller in which murders committed by a secret corps of Danites are casually sanctioned on an everyday basis by the LDS church hierarchy. If you're of Oriental descent, imagine Sax Rohmer got published.
Dan Brown doesn't care. If something sounded cool, he threw it in. I'd find it all much easier to forgive if he hadn't gone out of his way to give the impression that the novel had a factual basis.
Why do people like it? I thought the best summary of that was a line I ran across a while back in an
Amazon review of the book:
"Will make stupid people think they're clever." And why not? It worked for
The Bridges of Madison County.