The “benefits” of first-cousin marriage

insular communities held together by “inward” marriage, perhaps because these have a tendency to become ever more detached from the moral trajectory of wider civilisation. Just look at walled-off Christian sects and millenarian cults.

And the role this all plays in keeping women hidden and sequestered in their traditional subservient roles should surely be clear enough. 

This is also worth a read:

For British Pakistanis, moving away from their hometown and leaving behind family is not easy. Many start a fresh life in the UK but eventually become fearful that they will lose their cultural values and, as a way to stay connected, they encourage or even force their children to marry back home within the family. This is an attempt to keep family ties strong and maintain family relationships.

Others will frown upon the British culture i.e. clubbing, dating, pre-marital sexual relationships and as a way to prevent their children from engaging, consanguineous marriages will take place.