So we have learned that you would be OK with companies that didn't hire non-Christians, didn't hire women, didn't hire Black people.

Unfortunately for you, you live in a country where institutionalized bias is against the law, like almost all developed countries.

Have you considered moving to some other place where they share your opinions? Somalia and Yemen are basically lawless, you might fit in well there. Yes, Korea and Japan also allow institutional racism, but (sucks for you), Americans are one of the groups they are prejudiced against.