Elegran
The ethnicity and the culture from which first or second generation immigrants have come influences their attitudes to first-cousin marriages as well as to their take-up of pre- and peri-natal medical attention. A combination of thsese factors could affect the data in some areas (eg Birmingham) which itself could have an effect on the national average.
Mentioning that is not focussing on Asian women (or "getting at them" which is implied by people who object. It is pointing out one of the factors that could predispose a section of the community to the damage or deaths of newborns.
It is not either a reason to do nothing. Clearly there is a need for more contact with some pregnant mothers, in a setting where they will understand the language used and feel welcomed and included. This includes a wider demographic than just the "Asian women".
I agree with you, but that doesn't explain why the group with the highest infant mortality rate is Black Caribbean or African.
Clearly genetics is one factor (which is why - especially in the US - Ashkenazi Jews are offered genetic counselling), but other factors include sociological and socio-economic.


