This is not a debate over the 10 Commandments, it is a debate over Federalsim and the Constitution. When the 1st Ammendment states that "Congress shall make no laws" it is clearly stating that this is NOT an issue over which the Federal Government has any authority. Further, the Constitution, in the 10th Ammendment, clearly reserves the the authority to the states and the people respectively.
The ten commandments are the basis for all our laws, and our constitution, and it is God that gives you all the rights contained in the bill of rights, not gubment.
Those comandments should be posted in every courtroom, law office, and gubmint building in the land, prominently and perminently.