These people have no souls. They are disgusting bullies, plain and simple.
The baker does not owe anyone his time and labor. The man in this story and the gay couple prior are able to walk in and walk out with any cake he has for purchase...but they don't want that, they want to force this man to expend his labor in creating a custom cake depicting a message that goes directly contrary to his beliefs.
You don't have to share those beliefs, either, to see how wrong this is. Other scenarios would involve forcing a Halal restaurant to cook and serve pork, or to flip the coin: a gay baker must design and make a cake depicting whatever verse in the bible those nut jobs quote to say their God is against homosexuality. Or maybe a black baker creating a tiered cake of the scene of some KKK spooks lynching a black man?

There was another story circulating around at the same time of some white supremacist parents who wanted their child's name to be 'Adolf Hitler Whatever' or something to that tune, and they were denied that by the judge. Apart from the abject stupidity of naming a kid that and expecting their life to be anything BUT horrendous, I don't see how it is any judge's choice on what a parent names their child. I guess in short, I think we have way too many federal judges, and I think we give them WAY too much power, and freedom to wield that power however they want.