How is Christian worship different than Christian religion?

I'm afraid I may have slunk to the depths of troll question engineering, but I'm having a hard time with this answer. According to some facebook meme it is "dictionarily" invalid to argue that "sanctity" is a state that can be enforced by the government. I attempted to call this particular facebook personality out on the carpet by saying that their definition of religious was invalid; that it did not include worship. I've been hearing a lot about this recently on Relevant Radio concerning the redefinition of the First Amendment of the U.S. Constitution to mean literally, freedom of worship, instead of freedom of religion. Did any of the Popes write on this? What is Christian religion over and above Christian worship and why must it be protected?