@martianvenator The Jewish IQ thing is interesting because it's not been fully explored. I can't remember the exact details, but basically it was a really small sample, and either better data is not well known, or no one else really bothered to look passed that one small study.

The large issue is that even if it's true, it does not fully explain why, in a nation with 330 million people, only 16 or so million people are totally over represented to the point of being utterly ridiculous. If half the Jews had IQ's above 115, while only ~5% or so non Jews do, there would be around as many non Jews with IQ's above 115 than there are Jews in the US.