This is a very complex issue for starters and brings in loads more complex issues the more you think about it. I can see the superficial appeal of legislating against cousin marriage as a way for Parliament to try to slightly challenge some communities’ extreme patriarchal norms in the UK.
But how would this actually be policed, we are talking about families with young kids? If a married couple say move to the UK with their kids from an country where cousin marriage is common practice and it turns out they’re cousins, there’s no benefit to anyone for the UK police to be coming to their home to split up that couple and family because their marriage is illegal is there? Or the many married couples who have been for years in the UK and who are also cousins?
To enforce this law we would have to be happy for some very intrusive policing to happen and I would be very worried about the implications of that.
The ‘increased genetic problems’ angle is true but is a red herring. Because we don’t police this level of slightly increased genetic risk in other areas - whereas we do already legally proscribe actual incest for example, which is much more likely than cousin marriage to produce genetic problems by human inbreeding. So I feel the law has already done its work regarding genetics here. A thing to do could be to make our whole society and media more interested in sharing the results of research which are looking to discover more about genetics and health. Then communities can take their own steps if they can see clearly that there is a big increased risk if this is proven to be the case. (I’m not sure it has been, sounds more like small increased risks have been evidenced)
The real issue seems to be about how to integrate and support communities with extreme patriarchal values living in the UK in all kinds of aspects of living life here. And that’s a much more complex cultural issue which the UK hasn’t really collectively tackled yet and would require complex cultural discussions to try to challenge or change, but these discussions would need to be taking place internally to those communities initially for there to be voluntary changes.
Governments can’t legally and forcibly impose cultural changes via external sources on communities to the extent of changing key cultural practice and still call themselves a democratic government that supports multiculturalism.
I definitely don’t want to see the total cultural about-face and major values change that a UK government would have to undergo to give in and give itself powers to go into communities and force change on people like this and actually split up families.
A good place to start would be teaching all kids in every UK school more about democracy and why it’s protective and important for everyone in society whoever they are. Teach kids more about sexism and why it hurts women and men. Basic values education.
But even if that happens, many families will still have kids with genetic problems and we should never move to position of stigmatising those kids who need a lot of support because we’ve blamed the parents for their behaviour which may have slightly increased the risk of the genetic problem happening. Exactly as I don’t want to ever see legally enforced younger parenthood across society either.