So do you want our laws based on Jewish law or Christian law?
They are not identical.
Our legal system is only based on the general moral principles of the Judeo/Christian religion, not on the religion itself. It’s based more on the Judeo/Christian culture than on the religious law.
For instance, our legal system does not condemn anyone for taking the name of GOD in vane, or coveting your neighbor’s wife.
On the other hand, Sharia law is a direct dictat of Islam. A man can beat his wife, cheat his neighbor if the neighbor is not a Muslim and do all sorts of other actions that are considered a crime under our legal system. Both your plural relativism and moral relativism would say this too, is a cultural issue and should be considered equal to our Judeo-Christian based legal system.
It’s not equal under the constitution.