Well this is an example of why the claims of higher ashkenazi IQ are likely greatly exaggerated and the studies that allegedly show this keep turning out to be worthless when you dig deeper. Every group has subgroups that likely are well above the rest of their kin. I could probably make a case that the dutch are the smartest group on earth by selectively picking upper class dutch people, or a group of diaspora dutch immigrants living in say australia or whatever.

Do I honestly think lutherans are some IQ master race? Obviously not, although they are probably higher than average, but if I set out to "prove" they were I could manufacture studies and cherry pick samples to show they are, especially if doing so would get me more funding and career opportunities, as is definitely the case for some academics trying to burying their head up Jews ass by going full jordan peterson on how superior they are.