The Constitution was written in 1774, "In God We Trust" was added to paper currency in 1955. We got by without it for 180 years, so I don't think it's fair (not that I'm accusing you) to talk about it in a historical (as in the Framers) context.
I obviously wasn't talking about it as in the Framer's intent. I was talking about it in the "who really cares" intent. It certainly wasn't AGAINST the Framer's intent. It's just one more thing we've changed. Like adding stars to the flag.