Let’s say a Catholic priest walks in a Jewish bakery and asks them to make “Communion” wafers. Should they have to comply?
What if an Orthodox rabbi hires himself out to conduct Jewish weddings, and a toeiva couple asks him to officiate? Should he be able to decline? (Something similar, involving Xians, already might be happening in Idaho of all places.)
Should a police officer be required to participate in a gay rights rally (not protect people there, but rather participate in the event)? This has already happened, in Utah. Yes, Utah. A police officer was fired for not wanting to attend the rally. (He was willing to do his job there, to provide security or whatever, but that’s not what he was asked to do.)
The Indiana law is just like similar laws throughout the rest of the country, which allow little things like Muslim prisoners to grow bears contrary to prison regulations, and things like that. The only difference in Indiana is that corporations also can ask for a religious exemption, and that it can be raised as a defense in a civil suit. The law doesn’t guarantee religious exemptions, it just gives them a day in court.