Can you suggest a better term to use than ‘religion apathetic’?

This is a person who just doesn’t care about religion. These people can still go to church, they can still clasp their hands together, pretend to pray and even say, “Amen,” when everyone else does, but deep down, they really don’t care about religion and they really don’t believe any of it. They merely go through the motions and pretend to be religious so that they get along with the other people in their social group. But ‘religion apathetic’ is somewhat of a brous term; can you think of a better term to describe these people?