“United States courts are already obliged by the Constitution to apply the law of nations when it has been positively enacted by our government; if it is not, it has no force.”
Paul Horwitz teaches constitutional law and law and religion at the University of Alabama School of Law. 26 Mar 2011
Have you read the comments at that link?
One commenter states that Sharia is being used to drive Christians out of Muslim-dominated communities in the U.S. They are doing so via Sharia law which discriminates against anyone non-Muslim.
The problem is Paul Horwitz views Islam as a religion, which it is not. It is a cult.