You're right, there is not hope for Britain as a whole anymore in my opinion. For an observant Jew, Places like East London, Bradford, Luton, Birmingham are no entry area's, It would be suicide walking into these places, Christians know they are not welcome in these areas too.
Europe is fighting a losing battle, America has Muslims but not as many, they can stop the Muslim immigration now and stop the cancer that has destroyed Europe, unfortunately, trying to put this solution to politicians in Europe and America is like having a conversation with a brick wall.