You have to remember that only 50-60% of the gross goes to the studio, the rest goes to the theaters/distributors.
So only you take off the 40-50% off the total gross, and add in the promotion/advertising costs, the movie lost money. Which is why there is not going to be a sequel. It has nothing to do with Christians halting his movie. Although they may have done so by refusing to go see it.
Yup, Pullman is just mad that God via Narnia kicked arse against Athiesm. The childish world view of Athiests shows up in so many different ways.