You said the passport will be "required for commerce", but the article you linked to doesn't say anything like that. Making "the mark" mandatory to buy and sell is a huge difference, one the christians would surely notice! Then again, they don't seem to mind the patent number was 666, and most of them are still lining up for the injection, so maybe they don't care. Hell, you could probably call one of the ingredients Luciferase and they wouldn't mind.