There will never be peaceful segregation between communities while one community chooses to shut themselves off from everyone else and refuse to even try to integrate with the local people. That creates division and ill feeling, when that's the first thing you should be looking to avoid. And this is the alienation problem the majority of people have with the Muslim communities. There are areas of East London where road names are written in Arabic for crying out loud. They don't want to integrate and they never will integrate.