Masterpiece Cake Shop was as well. The court ruled in his favor, but was able to wiggle out of resolving the constitutional questions because of explicit bias on the part of the CO Civil Rights Commission.
I think this is the right approach. A Christian could go to a gay baker, asking for a cake that quoted a Bible verse that said that homosexuality is a sin. A gay rights convention could ask a Christian baker for a cake that said "Christianity is bigotry". The rules for one have to be the rules for the other.
My preferred answer: Put a gay baker and a Christian baker in a room. Tell them to come up with the rules. The rules will apply to both of them. Give them two hours. You'll get a reasonable proposal. Make that the rules.
I disagree. A racist white shopkeeper and a black shopkeeper set to the same task in the 1960s would not come up with the Civil Rights Act; they would come up with something that segregated people further. I think the same would occur here.