Bill O'Reilly thinks Christianity is a philosophy

Why can't theists even look up the definitions they use?

http://www.youtube.com/watch?feature=player_embedded&v=dlApGy4WP-8

Religion:

1. 1. Belief in and reverence for a supernatural power or powers regarded as creator and governor of the universe.
   2. A personal or institutionalized system grounded in such belief and worship.