I don’t think you have a good grasp of our form of government works.
If Christians had to check their faith at the door, they couldn’t participate in our government. No one does that, though, even though secular humanists claim to be “neutral.”
There are nine people who wield a great amount of power by sitting on the SC, and it is beyond any debate that their personal views, with the most important being their belief on God, that determines their decisions.