The quote from the above article from Chief Justice Roberts' opinion is also one worth noting:
"The government's argument echoes the classic rejoinder of bureaucrats throughout history: If I make an exception for you, I'll have to make one for everybody, so no exceptions."
He then went on to say that the very point of the Religious Freedom Restoration Act was to require consideration, on a case-by-case basis, of claims to religious-based exemptions from laws of general applicability.
I find it... amusing that faith - rather than, say, responsibility, "scientific evidence" or medical relief (although I'm never sure where we've got to on that last one) - is the grounds upon which laws can be discriminatorily applied. Perhaps in today's world, what we profess to believe is more powerful than who we actually are. Perhaps the hidden religious depths behind most world leaders spark a seed of mutual recognition, and the fear of hypocrisy. A perfectly mature, responsible individual can be denied the use of somethig potentially dangerous simply because it's for her or his own sake. If you have the chutzpah to proclaim transcendence, though, then you might have a chance.