Interesting:
NHS midwives told there is ‘benefit’ in marriage between cousins
"Official midwifery guidance, used for teaching, branded concerns about the risks of congenital diseases, or birth defects, “exaggerated” and “unwarranted” because 85 to 90 per cent of cousin couples “do not have affected children”. The national average rate for children born without congenital diseases is 98 per cent.
"The guidance did admit there were some “risks to child health associated with close relative marriage” but claimed they should be “balanced against the potential benefits”.
"Marrying a relative can offer “economic benefits” as well as “emotional and social connections” and “social capital”, advice in the NHS document said."
I certainly don't think this is the only issue though! I don't believe the bad actors are spreading their influence only to their relatives, I personally think the problem is the very notion of 'communities', where community means segregated and culturally foreign. They're not all related by blood, they are related by culture.
But no idea what at this point can be done to unravel it all. It's been pretty evident this was a growing problem for at least a couple of decades, and it's probably realistically too late to stop it now. To be honest I think we just to have to accept that some of our cities are now Islamic self-rule, and hopefully try and learn how to stop others joining them.