I don’t know, I read a Pakistan Today article where a doctor said cousin marriage is no big deal as it “only” causes defects in 2% of cases. Interestingly, this article is now impossible to find on Google. You can find a dozen news articles of people in the UK arguing about this.
Hopefully the discourse is shifting, but a culture can be dysfunctional (like allowing first cousin or even worse double first cousin marriages, for example) for a very long time before it collapses.
