What is missing from this thread, about of course one vile individual, but has blossomed out (as usual) into a discussion about immigration, is that throughout the history of this nation we have been changed by constant immigration.
Since tribes of ancient people crossed over the Dogger plains in what would become Britain, we have experienced the inflow, and outflow of what would become, or were, "Brits". The Romans came, then the Anglo Saxons, followed by Vikings, with the Normans coming in quick succession. Since then the British nation has been joined by numerous nationalities with the ebb and flow of Empires, with the British Empire 'encouraging eventual mass immigration after years of Brits emigrating / invading so many corners of the World with slavery also a contributor as it is still in the USA. Earlier global 'Events' such as the Roman, then Otterman Empires extending their fingers across the Eastern and Western areas of the globe, with lets not forget, the "Christian" Crusades adding to the movement of the worlds people, that of course affected the British Isles along with everything else.
World Wars have also added to the British mix of people with Britain becoming, proudly, a base for all democratic minded people to fight oppressive evil regimes. This constant mixing will continue throughout the future as it has in the past with especially Islamic religion working with, and changing alongside Christianity. The former is evolving 500 years behind Christianity, with, to us as Christians, old crude ideals. Christianity went through that process from our pagan background and has had many black moments in the distant past. All will eventually balance out in God's world and we all will live in an advanced society where all creeds, cultures, and colours of people will work as one.