It is superfluous.You can't legislate someone's conscience.And funnily, it's the Satanist that gets off lightly in all this, with the PC stuff.Picture...
JUDGE: Do you swear on this bible to tell the truth.
SATANIST (thinking to himself): Oh, phew! I was sure he was gonna make me swear in Satan's name.What a relief! Now I can lie my ass off then.