It's like Dennett speaks of. What they really do is believe in belief in God, they don't believe in God.
But: I agree with Eilonnwy about the compartmentalization.
I think there's another way at looking at the same thing. I think they might believe in God like a part of the time - they are too distracted by life to really deeply believe in it, or their subconscious just won't let them as a defense mechanism. I think their belief is more in the back of their mind rather than right at the front like a row of pikemen ready for some action.
EvF
But: I agree with Eilonnwy about the compartmentalization.
I think there's another way at looking at the same thing. I think they might believe in God like a part of the time - they are too distracted by life to really deeply believe in it, or their subconscious just won't let them as a defense mechanism. I think their belief is more in the back of their mind rather than right at the front like a row of pikemen ready for some action.
EvF