Frankly, that's retarded.
Unless every British person whoever disagreed with/looked different from/earned more than another British person emigrates, community cohesion will always (and should always) be an issue. Turning entire groups of people away (or forcibly kicking them out) simply because they are perceived not to 'fit in' is tantamount to fascism. By your logic, I, who was born here and am not going anywhere at the moment thank you very much, would have to be deported simply for my beliefs. Er... No.
But hey, you personally are not in power, so there's nothing to worry about from your venting.
What is worrying are these increasingly far right-wing trends in Europe. As Keltoi has said, multicultarism isn't something that can just be thrown out because it's perceived not to work. The cat's out of the bag, the beans have been spilt, the horse has bolted etc etc.
On the other hand, it's not at all surprising that generally Muslims are being singled out. To reactionaries, we're like Jews and Commies mixed, comrade-gentile.