There has been recent talk in the Catholic blogosphere re: the role of making allowances for other types of justice systems to have a place. I found an article today on the American Thinker today - and I think it cuts to the heart of what many feel re: the public law and connection between God, particularly in those states with a Judeo-Christian foundation. The entire article may be found here.
A pull quote I find interesting and relevant is from John Adams:
"We have no government armed with power capable of contending with human passions unbridled by morality and religion. Avarice, ambition, revenge, or gallantry, would break the strongest cords of our Constitution as a whale goes through a net. Our Constitution was made only for a moral and religious people. It is wholly inadequate to the government of any other."