There is one possible example in scripture about display. The Ark of the Covenant contained the tablets of the law and it was always carried before the people and was eventually placed in the temple in the Holy of Holies. Moore is right about one thing. The 10 commandments are the basis of U.S. law. All one has to do is read the founders' writings to know that. So, if they are the basis of the origin of our laws, what's the problem? There is only a problem if one believes that law evolves in the atheistic darwinian sense (here is that religious connection again!).
Look - this would be easier if you would read Moore. He says that he "can't" follow the court order, because to do so would violate God's law. I say that is sophistry, because there is no Biblical command requiring his display. What Moore is really saying is that every Chief Judge who came before him, and every other judge or official who doesn't display the Ten Commandments, is in violation of God's law. It is ridiculous. In the absence of a "higher" order to leave the display, why is he not obligated to follow the civil law? One could even argue that placing this much importance on the monument, rather than on the Commandments themselves, may violate one of those very Commandments.
The real reason behind all of this is that he set up this confrontation on purpose to prolong and play out, on television, his conflict over the display of the Ten Commandments that he used to first acquire fame and power for himself.