I’m Catholic. If I went into a bakery to get a cake for a Confirmation (or something else) and the person said they believe Catholicism is a cult and they won’t bake a cake for a Catholic event, I would have no desire to force them to make a cake. And I wouldn’t support any other Catholic suing them. What would be the point?
The point is to intimid-ate all who would dare stand in the way of the homosexual agenda .
The only difference in your analogy is that the objection is to supporting a theological practice, versus support a immoral practice, though to compromise one's beliefs is immoral.
However, as long as it is a common service one can get someplace else, I would support a Catholic baker having freedom to refuse to bake a "Happy Birthday Reformation" cake.
If SCOTUS can prevent forcing a Sabbatharian to work on that day under the premise that the company can easily get another to supply the service, then a Jack Philipps should not be forced to provide a service against what he considers sacred.
But the since this allowance of protection can be a slippery slope which get outs of hand (a Farrakhan disciple refusing to make a birthday cake for "white devils"), then besides not making choosing sexual preference a civil right in the first place perhaps the solution is to broadly forbid discrimination but fine violators simply the amount of any additional cost of the replacement and in compensation to the person's inconvenience, not hurt feeling$.