Craig, I know you're not an atheist, I hope no one thought I did.
If you want to get out of saying it, telling the court that it is "nonfunctional" might not be the right approach. I worked in the local court systems for 15 years. I think here they would excuse you from saying it if you made it clear that doing so would be "disturbing." There are a lot things about court procedures that are traditions and not functional.
I just suggest finding out what your options are before you are called to jury duty.