Several years ago Bill Clinton sued the producers of the movie Contact because they used a portion of a presidential address to the nation in the moive; based on fair use he had no leagal leg to stand on yet he still sued. The reason the lawsuit was filed (knowing he was going to lose) was to make the statement that he was not involved in producing the movie because he didn't want people to watch the movie and think "shouldn't he be running our country rather than play himself in a moive?".
The reason this lawsuit has been filed is because the church does not approve of the content of the movie. Regardless of whether you agree with their stance it doesn't make sense to say narrowminded things about the church. Imagine if a movie producer created a movie titled "Picking up 12 year old boys for fun and profit" and had an interview with you in the movie which your words were taken out of context and then played heavily in its trailers; would you sue the producers of that movie?
