Talking of Boris Johnson, did you know his great-grandfather was a Muslim Turk
A certain Ali Kemal Bey, a liberal Turkish journalist and the interior minister in the government of Damat Ferid Pasha, Grand Vizier of the Ottoman Empire
As for Islamic Law/Shariah its a complex subject just like the Roman or Chinese Legal systems, but in its caricaturised form, its a favourite target of the Daily Hate Mail et al... - but then I can't say I'm surprised when their focus is on Rent-A-Mob Anjem Choudary - self-styled Judge of the Shariah Court UK - which exists only in Cyberspace and his own vacuous head. He's the one responsible for 'Behead those who Insult Islam' placards and other colourful choice slogans like 'Butcher those who insult Islam', 'Europe, you will pay, extermination on its way' etc...
and the harranguing of the Royal Anglians in Luton recently. He's about as representative of Muslims and their Legal Tradition as the National Front is of the indigenous white population and political tradition in the UK.
Not sure how we got onto the Ottoman Empire and the National Front from the WOT box though