You don't need genetic inheritance to explain Jewish over-performance, cultural inheritance is enough. Do mind I don't know whether there is a genetic component involved but I do know it is not needed to explain why Ashkenazi Jews outperform other cultures.
Looking at national IQ averages [1] currently Hong Kong seems to score highest with an average of 107.73 while Israel is below average at 98.57, below most European countries as well as below the USA. The top 6 in the list are all east-Asian countries, the lowest are nearly all in Africa with Somalia lowest at 83.84.
[1] https://worldpopulationreview.com/country-rankings/average-i...