Peter Jackson said he avoided putting any political viewpoint into the Lord of the Rings, which he said would have been easy to do. But he hates it when film makers do that. He just wanted to present the story and let it speak for itself.
I've noticed that when film makers do that, the content usually seems to be rather conservative. Lord of the Rings was a call to arms against an evil that wants nothing but your destruction. No negotiations, no compromises. Sound familiar?
The Battlestar Galatica series is the same way. They present both sides equally when their is a conflict between characters on that show. Watching it, I always think how much that show espouses conservative ideals.
I have noticed that as well. Even when they push a liberal idea (abortion), the reality of events causes things to come out with a rather non-liberal (conservative) view.