I made a decision to stop "cussing" a while back. I figure if I can't make a point without using the "F" word every third word, I'm pretty incompetent. It doesn't offend me, though in my view, it makes one's argument less impactful and more puerile. As for religion, we all have our beliefs generally not based purely on logic, and thus is not really subject to argument. I have zero desire to make light of another's religious beliefs (there could be an exception for the truly weird ones). I don't think others should either, at least not here. I don't think it possible to argue in print that one should or should not adhere to some major religion. Usually, "we" adopt whatever religion was in proximity to our childhood and culture. Often, a person rebels against that, as noted, and goes to the other extreme. It's akin to the person who stopped smoking and started working out, they can get obnoxious, for no reason.
Anyway, in my view, the F and C words should not be written here.