This is indeed worrisome, and something that I have been worried about for many years now. This is not good and nothing good will come out of it for the UK, the non Muslims and the Muslims themselves.
When a society starts to undertake fratricide (killing of its own brothers), something good in the soul of the country disappears. Take a look at the USA, the wounds of the civil war decades and centuries ago are still not healed. Is this what we want to leave for our children? Germans are still known as the people who were responsible for genocide. The Brits are already dammed by their history in South Africa and in their role in colonialism and imperialism. Do they really want to add this to their list?
We seem to be going in reverse!