There is almost no complexity to this situation at all. It is simply time to grow up a little. Your religious beliefs have absolutely no claim on others, not even your closest friends. It is really that simple. The belief that one's own religious beliefs should have any consequences at all for the behavior of others is a tragic error that will destroy friendships and alienate coworkers.
Profanity is an unfortunately weak kind of speech. You should forgive your friends this minor weakness. It is also speech that is a relatively safe violation of relatively mild social norms, which is why it is attractive to teens. You should be able to understand this in your friends. Make your own decisions about your own speech, ideally without relying on superstition to do so. Leave others to their own decisions, unless they seek your opinion.