It's a very interesting question. I suppose the logic of the ruling shouldn't be restricted to "official" religions at all. Even in the calculus example, we can

It's a very interesting question. I suppose the logic of the ruling shouldn't be restricted to "official" religions at all. Even in the calculus example, we can imagine there could be homeless people who are religiously opposed to calculus, and I agree that the calculus shelter shouldn't be counted as a place to go, for such people.