Those advocating for no legislation on cousin marriage need to come and spend some time in the special school where I teach.
Over 70% of our children are from a Muslim background. This is not reflective of the local demographic, as 90% of our children are bussed in from other areas/authorities.
The effects of repeated first cousins marrying and having children is utterly devastating. The majority of the children I teach have such severe needs that they will require round the clock care for the rest of their lives. They require (and likely always will) support for all aspects of personal care, will never be toilet trained, cannot feed themselves, keep themselves safe, have a variety of medical issues that will stay with them for life and require near constant hospital admissions and procedures. Most of my children's cognitive abilities and understanding will remain at the level of a 2 year old for the rest of their (probably shortened) lives.
I love them all dearly and we do our best to provide a rich and stimulating environment for them, full of fun and affection, but their quality of life is extremely low. You cannot say otherwise.
And who is providing the care, love and support for them when they're not in school? Overwhelmingly the mothers. Fathers are rarely seen. Their mother's can't work, they are absolutely burnt out from being awake all night supporting their children. They have to sleep during the day, when they can. No respite, their quality of life is non existent too.
To actively and knowingly create children that have a very high chance of living a life like this is not kind. It's catastrophic for the children and for the mothers.
It is also putting an incredible amount of stress on an already crumbling SEND offer.