Recently there was a discursive exchange involving two “dissident-right” (DR) Youtubers, Ubersoy and Leather Apron Club. It centered around Ashkenazi IQ and ethnocentrism. Leather Apron Club claimed that Ashkenazi Jews only have an average IQ of 103.
He misreads a Richard Lynn study, performs shoddy math on Israeli IQ, and states that claims of a genetic intelligence advantage for Ashkenazi Jews must be bunk. He then speculates that the numerous studies showing a high Ashkenazi Jew IQ are probably fraudulent, in that their data must have been whole-sale fabricated.
Ubersoy and a friend responded with a 50-minute Youtube video wherein the direct genetic evidence for superior Ashkenazi IQ is only discussed for 2 minutes about 40% into the video.
I think this is a massive flaw with the video, and I suspect that they brushed over the genetic evidence because it involves statistics somewhat more complicated that a scatterplot. In fact, they only interact with the evidence by showing a scatterplot! I say this not out of malice but because I remember when I was in high school and interested in IQ discourse — I did not understand GWAS and PGS on a level deeper than scatterplot. Other types of evidence were easier to follow.
Leather Apron Club can be trivially debunked with the genetic evidence. I will therefore explain where we get polygenic scores (PGS) from and why it shows that Ashkenazis have a significant genetic intelligence advantage.