I think it's more about the polarizing affect he has on his teammates. He does the right thing and people don't like it. They want him to fail. He's not that good but he's steady and he doesn't get down so his players rally and make him look better.
He really isn't a very good QB. I think people are getting involved in the whole Christian circus. The boy can generate some excitement on the field, but he's really inconsistent. He might be okay with some retraining in the fundamentals.