It's all about how one's religion/faith/superstition (take your pick) will affect the rulings in a society that on paper guarantees freedom of religion/faith/superstition (take your pick again).
As an orthodox Catholic that is member of a cult where one makes an oath of obedience to the leader, you for sure want to know which oath is the deciding one: The cult leader or the Supreme Court.
On the topic here is a good read with respect to her religion:
President Trump’s nominee has written about how religious views and judicial views intersect — and sometimes collide.
www.vox.com