It's a reference to the tendency of Muslims to marry cousins.
Where I'm guessing it will simultaneously be decided that it would be racist to target them/ good Muslims never watch porn/ carry on ignoring the problem to the point where most people aren't aware. I only know about it because an ex was a medical professional
Islam does not tell you to do this. It's the cultural practises of specific kinship networks in the UK, especially from Mirpur. And the practise is also currently on the decline.
The irony is, of course, that this law is being proposed while the NHS has been advised (by a quango, not the government) to stop discouraging cousin-marriage: https://www.thetimes.com/uk/healthcare/article/first-cousin-... -- the NHS is not required to accept this advice, and indeed the links above show that cosanguinity is decreasing, partly because of public health initiatives telling people what the harms are!
Thank you, that substantially adds to the discussion. It is that in particular that is the WTF, not the idea of hereditary titles themselves, nor their penchant for intermarriage.
If only there was a way of correcting people that wasn't so rude.