Read other letters about this article
I have to take issue with your rather conclusory statement that if you would happily live under Sharia law you are therefore a terrorist sympathizer. If you are already living according to the law put down in the Koran you would have no reason to be unhappy if that is the law of the land. They did not say they wanted it to be imposed on all others, just that they themselves would be happy under that law.
The reason for the British government's dealing with ethnic groups in blocs has much to do with its evolution as a state with an officially supported religion, the Anglican Church, while also allowing some state support of smaller religions like Catholicism and Judaism. An example is in the school system. To refuse to extend the same deal to Muslims is to deny the ability of Islam to co-exist in a western liberal state. France deals only with people as individuals and does not support religious schools or deal with people as communities. I think you are possibly the only person to ever bring up France as a state to emulate with regard to Muslim relations.
It’s an interesting topic you bring up; I just wish you had actually done some, ah... research on the subject.