Well, I'd partially agree with you. Religion is a matter of revealed truth. People have differing opinions about the truth that they have come to in their lives so in that sense, it is a matter of opinion. For some, the truth that has been revealed is that there is no God. For others, the truth is that there is a God. In each case, though, each side believes they have the truth of the matter.
The people protesting the movie are not threatened, in my view, by a mere movie. They are threatened by something that is 1) ubiquitous and 2) calumnious. Why should they sit silent when what they believe so strongly in is being vilified on a zillion screens every weekend? They are "sorry souls" because they have decided to make an alternative statement? Since when did expressing one's opinion about matters that concern one's self become such a paltry thing?
I'm Catholic and I cannot tell you how many people I've spoken to who are not Catholic (most not even "churched" - no religion at all) but who came away from either reading the book or seeing the movie and half-convinced about some of the statements made. The problem is that quite a few people treat this work of fiction not as a complete fiction but as a sort of "historical novel", where a fictitious story line is woven around basic historical facts.
If everyone going to the movie or reading the book treated either with skepticism, there wouldn't be a problem. However, lots of people don't. Therefore, people try to set the record straight.
That's pitiful in your view? Not in mine. Of course, it isn't your religion that is being pilloried on the big screen. DW Griffith's "Birth of a Nation" spread lots of lies about blacks. Blacks were depicted as corrupters of white women, shiftless and lazy, upsetting the natural order of Southern society.
They should just have taken the viewpoint that everyone knows that a movie is a movie and not been bothered by such depictions? If everyone was as sophisticated as to view a movie as merely a movie, maybe you'd be right. But not everyone is, or was.
Actually, I think that the protesters are a good role model for us. Here's a group of people, mad about something, who decide to confront what they see as a bad idea with a better one. They meet misinformation with better information. Sounds pretty much in keeping with the best aspects of our democracy to me. So even if you don't agree with their viewpoint, instead of viewing them as sorry souls, I'd suggest that they be viewed as acting in the best traditions of public discourse as envisioned by the folks that founded our nation.