Of course not EVERY poor Jewish boy scored that way. But the top percentile was way overrepresented by Jews.Multiple reasons. Did every poor Jewish boy in the tenaments score that way? How many out of all took the exam? How many came from families with a strong educational background? You have too many variables in addition to intelligence to make broad generalizations about racial or individual intelligence, not to mention there multiple types of intelligence. How do you untangle environment, culture and education?
And as I said, these poor Jewish boys did NOT come from families with strong educational backgrounds (or else they would not have been poor.)
The fact is that genetics account for a LOT of why people succeed, although leftists (mostly) like to find external reasons why some succeed and some fail. That is why you like to discredit the idea of inherited IQ (or the validity of IQ at all), along with traits such as motivation.