"The flight routes from Pakistan to the United Kingdom are now the most important ideological conduit for radical Islam. The London bombers last summer were British subjects of Pakistani origin. Last week, two more were arrested in connection with the Tube bombings at Manchester Airport as they prepared to board a plane to Karachi.
Meanwhile, flying back from Karachi and Islamabad to Heathrow and Manchester are cousins, lots and lots of them. In his detailed study of the Mirpur district in Pakistan, Roger Ballard estimates that at least half and maybe up to two-thirds of those living in Britain of Mirpuri descent marry first cousins. This is a critical tool of reverse-assimilation: instead of being diluted over the generations, tribal identity is reinforced; in effect, Pakistani tribal lands are now being established in parts of northern England.
It is often forgotten that the Dark Ages were also the heyday of multiculturalism. Each valley held its petty lord and it was possible for places separated only by a few miles to speak totally different languages. But it can't happen again, can it?"