She has been arguing that, as a Christian, she should not have to follow state rules about judicial impartiality.
A judge who cannot separate their religious bias of what is right and wrong from their role as a judge (the impartial arbiter of law as set forth through the political process), isn’t just saying the separation of church and state shouldn’t apply to marriage. They’re also saying they cannot legitimately sit as a judge because they cannot keep personal bias separate from their role as a fair and neutral arbiter. She’s telling on herself.
Yeah, when today’s xtians act like the founders left their little book club out of the Constitution as some kind of “oversight” (if they even know or admit that fact at all) and that they all just assumed everyone was going to be some (Protestant) xtian as some kind of requirement to be a full citizen, they are skipping over quite a bit of context.
Of course the Inquisition was still a thing and certainly the horrible things xtians do to not only “unbelievers”, but to “heretics” (meaning xtians they disagree with over some bit of doctrine), was something the founders would have been keenly aware of.