Stoning Adulterers in England?

The Introduction of Shari'ah in Family law in England is unavoidable. So says the current Archbishop of Canterbury, Rowan Williams. He says that we should not assume that all aspects of Islamic law are barbaric and that a "plural jurisdiction" would be acceptable. (Speaking of "meekness and flabbiness" see article on Hitler below). This reminds me of law during the middle ages in England, where you once had the secular and ecclesiastical courts. Once you have granted the principle that Sharia law in England is to be considered acceptable and even inevitable, how do you prevent Moslems from stoning women for infidelity after they have been convicted in an Islamic court? Or chopping off hands for theft? Perhaps Islam will become the new "law and order" party for England. After all, who are you, western snob, to stand in Judgment over the law of Islam, the word of Allah? What makes you think you are better? Not to mention that if you do c...