I really think it was dysgenic and it does seem like the german jews were more intelligent than eastern Russian jews who have more European blood and a much lighter complexion.
this accounts for why Israelis don't seem as intelligent, secular, and educated as American jews.
American jews are much darker, shorter, wealthy, and secular than Israelis who tend to be tall blond, and uneducated.
the Israeli gene pool was impacted by the eradication of most gemran and western jews.
