How about if all Christian faiths declare that 0bamacare violates their religion? I’m quite confident there are some Protestant groups who would do this. Would that immediately give them an exemption?
What about conservative atheists? (Yes, they exist. I know some.) If I were an atheist, I’d be inclined to make up a religion which forbade 0bamacare and then I would claim an exemption. I’ve known people who got themselves “ordained” by various fringe groups and this was enough in the eyes of the law for them to perform marriages.