Not looking at the specifics of this case, but the principles behind it
The question here is, once again, whether it's OK to express religious views publicly - and I note than once again it's Christian, not a Jew or a Moslem (where the strictures are stronger)
The question here is what happens when two protected characteristics come into conflict. And the general view is that the position of the more disadvantaged is upheld.
Remember this when looking at trans posts on MN. The trans community is the more disadvantaged, so the (also protected by law, larger, more 'secure') group female non-trans find their position comes second, and is driven out of the public domain. That is why those who go too far in speaking their beliefs on how society should be ordered can find themselves ostracised, and unusually rightly so.
(fully expecting the GC pile on, but I hope otherness posters will realise that I'm talking about the underlying theory of what happens when two protected characteristics clash, not stating support for a view in either case)