I doubt it. I wasn't disappointed because I was looking for a good mystery story and I got it in both of Brown's books. They were fun reads. If I am looking for anti-Catholic history, there's plenty out there in the non-fiction section.
BTW, I don't see the Catholic cardinals complaining about "State of Fear", which is exactly the same recipe: Take some facts, add some conspiracy theory and mix well with a fictional plot. Get real and quit looking for enemies in every work of fiction, or people may begin to wonder if there really is something to hide...