Not everyone believes in food laws, so shellfish isnt a consideration. If someone came in and asked him to bake a cake for an adulterer party, he’d probably refuse to make that cake too. You are confusing the fact that the baker isn’t refusing to sell these people a cake, he’s just refusing to sell one for specific purposes, like an event.
The baker actually agreed to make the cake until the person ordering the cake explained that it was for their transition party.
I knew this would happen as soon as they passed respect for marriage act, that people would do something like this. If anything, this is harassment against the baker. Unless this person has no knowledge of what transpired just a few years ago, then they specifically targeted this bakery as a way to harass them, and force them to bake a cake.