Amen. As a Catholic, it would be a grievous sin for me to support an effort that slanders my Savior and his bride the Church.
I read "Holy Blood, Holy Grail" years ago and it was one reason that lead me back to my faith (because research on the theories and "facts" within were dubious at best). But I would never have read the book if I was already a practicing Catholic because of the blasphemes contained in it.
I'm a voracious reader, fifty or more novels a year plus my daily Bible reading. I tried reading one of Brown's earlier books, DIGITAL FORTRESS, I think, and the writing was so juvenile I only made it a few pages before setting it aside. I decided to give him another shot and took DVC with me on a cruise as my primary read. His writing was marginally improved and the story held my attention. Until he gradually shifted out of storytelling mode and into blasphemous preaching. At which time I tossed it into the Pacific.
MM