There are a couple of controversial ideas in "The Da Vinci Code," espescially if you're Catholic. Not knowing whether you've read the book or not, I'll try not to go into too much detail, but probably the most controversial claim in the book was that Jesus Christ had "intimate relations" and perhaps even married Mary Magdalene, and that she bore his child or children. Especially in Catholic dogma, the idea that Christ had sex, which carries the stigma of Adam and Eve's original sin, would be controversial (six hundred years ago, Dan Brown would probably have been burned at the stake). You'll find less outrage about such things among many Protestants, but it is still not an accepted idea. The book is also controversion because of its portrayal of Opus Dei, the Priory of Scion, and other Catholic people and groups. Whether or not the portrayals in the book are accurate, as Brown claims, many Catholics viewed them, especially the backwards and downright brutal Opus Dei, as a slam on the religion as a whole.If you're not particularly religious, or at least not a devout Catholic, you would probably not find anything overly objectionable, given a willful suspension of disbelief. However, the portrayal of Catholics and the humanization of Christ were beyond what some more "conservative" Catholics could accept.

It claims to have a historical basis yet was written as fiction, many would say because that's the only way the theory could be published. Any time you have a full-out attack on another person's beliefs, especially with faulty evidence on Scriptures heavily backed by archeology, manuscript evidence, and internal/external proofs, you're going to get controversy. Brown, at the beginning of his book, claims "all descriptions of artwork, architecture, documents, and secret rituals in this novel are accurate." However, there are many faulty mistakes made, some outright stupid, within the book. To see some lists of those mistakes: http://answers.org/issues/davincicode.html http://en.wikipedia.org/wiki/Criticisms_of_The_Da_Vinci_Code From: http://www.answersingenesis.org/home/area/feedback/2005/0812.asp?vPrint=1 "Convicted con-artist Pièrre Plantard testified under oath in 1993 that he had made up the Priory of Sion documents (as well as others proclaiming himself the ‘true’ king of France). Instead of acknowledging that his work is shoddy, Brown chooses to ignore the evidence, sitting comfortably behind his novel’s fictional categorization and responsibility-absolving disclaimers, and continues to rake in profits from the book that is duping people like you into giving up your eternal soul."

It's controversial because it presents an entirely bogus theory on the gender of the Apostles and because it undermines the New Testament. It's veracity is verified, all right, but it's verified by a bunch or pseudo-scholars who quote themselves and each other back and forth. A better name for it? The DUH Vinci Code.

its because people are gay