Da Vinci Code

I find it interesting that the author is pinning the ideologies of Brown and his academic motives to find the Holy Grail, against Opus Dei and its motives of suppressing the truth. It seems to me that throughout history it has been 2 ideologies trying to figure out what to do with the Holy Grail. Each seems to think that their version is right but we as the reader can tell that the Priory of Sion isn't perfect because of the strange and terrifying thing that Sophie saw. So as long as the Holy Grail is in the hands of the Priory of Sion, then what they want to do with it is subjective and only in their best interest and not in the best interest of the world, as the honorable thing would be. What do you guys think?