veidt: http://dictionary.reference.com/search?q=infidel
(in Muslim use) a person who does not accept the Islamic faith; kaffir.
Yes, I am quite aware of the word's association with infidelity in the dictionary. However, my first post clearly, clearly, outlined the error in this instance. But really, if the word is equal to just "rejection" be it, from a European perspective, why doesn't the Pope use this good, clean word?
In islam, humans don't commit infidelity against faith. They either take it or reject it. A freedom given to them.
Christianity however, they do commit infidelity. It's as simple as that.