"So the court must determine: Has Oregon, for example, compelled Catholics to sculpt totems for Wiccan rituals? Feminists to photograph fraternity initiations? Pro-life filmmakers to video abortions?" the brief asks. "It has not, and that ends the case."
THAT is spot on.
Bullshit. The bakers weren't asked to do anything they wouldn't do for any other couple wishing to get married. The marriage is legal. Discrimination is not.
None of your comparisons are viable. None of these are a protected class, which you well know. If the Catholics in question were in the habit of sculpting Wiccan totems, then it would be reasonable for the Wiccans to expect them to make some for them. If you are in the business of making wedding cakes, to refuse to serve gays, simply because you disagree with their basic rights, is illegal. As you well know.