Having said that, I DO think it's a First Amendment issue. But it's a freedom of speech issue. In general, anti-discrimination laws can be evaded by simply hiding your reasons for bias. By keeping your mouth shut. The crime is when you make your reasons obvious, when they are reasons that the state doesn't approve of (racism, sexism, etc ...). The baker could have easily avoided all this by making up some excuse for not serving the gay wedding. But he stood by his convictions and expressed them. THAT's why he was targeted. These laws are about suppressing ideas.