No, it is not.
Being a Nazi is a choice. Being gay is not. (Also, legally, being a Nazi is not a protected class.)
https://www.aclu.org/other/aclu-history-taking-stand-free-sp...
And having a gay wedding is indeed a choice, and Jack Phillips shouldn't be forced to participate if he believes that his belief in his god makes it so that participating is akin to taking part in evil.
They are not a protected class, which means you're allowed to do things like not hire Nazis without running afoul of Federal discrimination law.
I can be fired for being a Nazi, or a redhead, or a comic book fan. I cannot be fired for my skin color, or my national origin, or my religion. That's how protected classes work.
If not, why not? If so, why? If the answer is not 'Yes facebook must publish', how do you square this away that the answer is 'Yes you must bake'.?
You should pay attention to what's going on before commenting on out of date news.
Also, a similar case in washington of an old lady florist forced to provide flowers for an event she doesn't believe in. This is like asking a jewish deli to cater the nazis.
https://abcnews.go.com/Politics/gay-couple-wins-case-florist...
In that case, the SC explicitly denied the request, thus de facto legalizing forcing individual people with consciensce disagreements working in their own business to do business with those they disagree with. This is an obvious violation of the individual right to freedom of conscience.
Meanwhile, facebook, a multi-billion dollar powerful corporation, which does not enjoy constitutional rights neither by nature nor law, is given a free pass to exercise its conscience. Sorry... I'll speak for the little guy.