It's not necessary to see the movie, which you pass off as "dumb" despite not reading it or seeing it personally yourself. This means you are basing your opinion on what others have told you. And perhaps they embellished.... perhaps not. But you made your decision to not read or see it, but it seems that basis is due to faith, not because it's "dumb".
And I didn't see anything on the news or in my mailbox saying the movie was necessary to be seen. The only "havoc" I've observed are those who are screaming NOT to see it.
What makes you think I'm going to "snicker" at Christians? What makes you think I'm not a Christian?
As to the writer and his wealth, that's the way it is. Same as the Harry Potter author, Tom Clancy, Grisham and so many others. You write a work of fiction, someone in Hollywood decides to make a movie of it and pays you for the rights. Welcome to Capitalism.