mark, your logic is absurd. here's why.
i'm an atheist that has NO faith that there is "undiscovered or perhaps undiscoverable and impersonal law..." In fact, until you mentioned it it never even occurred to me to think that way.
but i tell you this: i absolutely do not believe in OXLDOTLY, a new belief system that explains our existence. i suspect that you are of the same mind here. why? because i just made up that word. But if we are to use YOUR logic, we are now BOTH A-OXLDOTLISTS because we both have the faith that "some undiscovered set of laws etc", other than OXLDOTLY's, is responsible for our existence.
"Uncaused causes", indeed. RUBBISH to all such twisted thinking and keep it out of my government.