Where is the smack causal racism? I don't think it's racist at all to speak up about the dangers of incest marriage / procreation.
There's a huge difference, if a couple are carriers of faulty genes who discuss / plan on having a baby. Presumably if they know they carry the genes, genetic testing / counselling can be done and the pros and cons can be weighed up whether to have a child. But that child wouldn't have to grow up with people bullying them because their first cousins decided to marry and procreate and due to their incestual relations, produce a child with disabilities.
A poor girl in my class was a product of 2 first cousins marrying. She suffered relentless bullying and name calling due to the incestual engagings of 2 first cousins. She speaks a lot more about it now and how it effected her. She has 2 younger brothers both with disabilities and the youngest will never live on their own. They need life long care.
It's not smack racism to say that it's wrong. Over time in western countries it will fizzle and have no place (as it's doing already)
It's morally wrong, a bit grim, and awful to risk a child being severely disabled and bullied for having incest parents - whether it's ethnic minorities or not. I'd say the same thing for 2 white British people doing the same thing. Especially if they are marrying cousins over many generations.
(This is my opinion on first cousin relations) as the cousins go down to 2nd, 3rd I guess it lessens the risk a bit thus blurring the lines.