I am suspecting that much of the Cannes film criticism. . .that is to say their 'over the top' mockery of this film has more to do with their own Christian bias and the fear that this movie; despite it's anti-Chrsitian hype from 'Rightside'. . .will give Christianity an religious/historical 'importance' that they would deny it. . .
Think this movie has the potential to actually move more people towards a Faith or greater committment to the Faith they have - rather than away from it. IMHO. . .
And if nothing more. . .it is an entertaining 'movie'. . .(the Albino and his whip gets tiresome however. . .even with eyes closed ;^) )