Should Courts Be Prohibited From Recognizing Sharia Law?

A recent poll found 83% voted YES, and 17% voted NO. (see http://www.isidewith.com/poll/393596598).  I don’t think this is the most germane question.  The ONLY law in the United States is the law derived from the United States Constitution and specified by Public Law and codified into United States Codes (U.S.C.s) and detailed for implementation by the Code of Federal Regulations (C.F.R.s, sometimes called administrative law). No other law, regardless of origin can be recognized in our Judicial Courts.  This is very simple.  I note that there are some countries that have allowed Sharia law in Islamic communities and I believe is an aberration of the laws of that country and is a formula for serious deterioration of the legal system of that country.  I also note that in some countries, the United States included, there are provisions that recognize a tribal law, but in those cases, it has been specifically detailed by the law of that country, thus maintaining the rule of law for those countries.