You actually can't see the difference between religious law being used to discriminate among applicants to a private, parochial, religious K-12 school and discrimination at a public, state-funded institution based on inescapable racial identities recorded by the government at birth?

If you've been subject to the discrimination it probably feels the same. public/private whatever you call them, they are all just groups of people, and exclusionary judgment based on a couple generations of dna, well I think THAT should be reserved for haShem only. Live by the sword die by the sword, reciprocity, lex talionis, karma, ... almost always catches up.

I think you shouldn't go around referring to Hashem when you blatantly don't know His laws. Jews face judgment, not karma.