Quote Originally Posted by Don Corleone
BP, I've never seen either movie, so I can't comment on them with any certainty. But from the IMDB pages, neither appears to propose that Islam is a pack of lies, altered from it's original form by unscrupulous men who even today lie and murder to keep their secrets. This IS the fundamental premise of the DaVinci Code.
Of course it should also be considered that due to lack of an organizational structure like e.g., the Catholic Church and the Vatican, Islam does not provide the same kind of subjects for conspiracy theories like Christianity.

But generally you are of course right - a similar movie on Islam would very likely lead to a much harsher reactions by some fundamentalists than we see in the case of the Da Vinci Code.
In the end it all boils down to the fact that most Christian countries already experienced a long history of questioning authorities - but this is less an issue of difference between Christianity and Islam than a difference in history and development of societal structure (that is only partly influenced by religion)