The first cousin disability thing is a myth. Look up the actual studies on this. There is 4-5% chance of a child having a disability normally. With first cousins it is 4-6%. Enviromental factors play more of a role. When you have 4 different parents between the couple, it doesn’t make a difference if they are cousins or not. Albert Einstein and Charles Darwin himself both married their first cousins. I’m not saying to do that just because they are a cousin, but in the future it will be seen as being a sexual oddity sort of like homosexual or transexual, although I’m sure it’s not an orientation for these Pakistanis and others.
Again, environmental factors play a bigger role. There are disabilities for reproduction in all kinds of relationships, and the scientific journal literature shows the percent chance does not increase until it is the immediate family. Remember, we are swimming in a pool of disinformation 24/7