The conversation back and forth of this movie made lots of folks curious to see it. If those against the movie had just shut-up the movie would not have had so many viewers.
Reminds me of when I was a young girl in the 1950s, when a book was published that may have been "risque" the talk was that it was banned in Boston, which of course made folks buy the book. lol
Should we just shut up when Christ is being attacked?
Shut up? Sure that would prevent any of the boycotting. People always go see something that derides religion or gives them an opportunity to discount the church.
But what would it say about the church members and Christians if they never even spoke up about Jesus being mocked, insulted, lied about? It would say they just don't care that their Lord is disrespected.