One of the Ten Commandments forbids taking the Lord's name in vain. (Coincidentally, everyone who knows me knows I swear like a drunken sailor, but this is the one speech restriction I really try to make. If you ever hear me screw up and do it, you'll know I've lost it big-time.) Shouldn't Christians not want "under God" in the Pledge to be said by those who don't believe in God? Shouldn't we want to honor God's name and make it special, rather than trying to make lots of people who don't feel that way say it because we think it keeps America a "Christian" nation (which it wasn't and wasn't intended to be? Remember, many of the founding fathers were deists)? Should we even want God's name in the Pledge, which most people just repeat without thinking about what it means?
"Render unto Caesar the things that are Caesar's, and render unto God the things that are God's."