Here's a question for anyone who is a citizen of the United Kingdom? Whats the highest law in the land? The answer is: It depends. In Britain, the nation's top judge, Justice Lord Phillips, asserted recently that Islamic Sharia law should be used in a variety of capacities insofar as it relates to Britain's Muslim subjects.

'It is possible in this country for those who are entering into a contractual agreement to agree that the agreement shall be governed by a law other than English law.'
-Justice Phillips

Herein lies the danger of nation's without a written constitution. We have already seen other nations (e.g., Canada) make exceptions for Islamic communities. Exceptions which do not apply to the larger population. Imagine if a Christian couple wanted a marriage or business contract to be based on the Bible, rather that the nation's applicable laws, or a Jew using the Torah or Hindus, Buddhists, Sikhs, etc...using their respective parochial systems rather than a universal code of justice. To what do certain individuals (i.e., Muslims) deserve such exceptionalism and where does it end.

Link:
http://www.dailymail.co.uk/news/article-1031611/Sharia-law-SHOULD-used-Britain-says-UKs-judge.html