The problem is the definition of "discrimination". Everyone _is_ able to discriminate all the time. I'm free to discriminate between cookie flavors I buy, or discriminate between genders of people I date. What the law forbids is not _serving_ people because of the color of their skin or their sexual preferences.

And that is also not the case of Jack Phillips. He didn't refuse to serve gay people, and IIRC the accusers on the case were regular clients.

He refused to _design_ a custom cake for a gay wedding, which is akin to a Jewish t-shirt designer refusing to design a logo involving a Swastika, or a black transgender baker refusing to bake a cake that says "white lives matter" or "sex is immutable".

This seems much more related to compelled speech than sexual discrimination.