Interesting arguments...
Well, being a molecular scientist, I found all the talk on genes a little funny...Because no matter how many articles you read people proofing ANYTHING from genes...few months down the line a new research kind of kicks that idea off....Same goes for IQ...People/ Lead scientists are STILL DEBATING about how much of a genetic influence is involved....
1 thing is certain in molecular biology...EVEN if YOU have the intelligence gene (which no one is sure what it is- all we know is it is made up of many genes working together to produce intelligence)....EVERY Molecular scientist knows that WITHOUT THE OUTSIDE (environmental) influence, that gene or set of genes (in this case Intelligence controlling genes) will not "switch on" or will not be synthesized, express itself or even if it expresses might not be functional without an environmental trigger.
Yes, articles report this and that...Well, thats how scientists are...they get excited and due to the competition produce an article to be the 1st to report this and that...only to be refuted few months later by a newer theory....
As for why Jews have a higher IQ...its basically because they emphasize on education. Have the means to send their children to better schooling and uni as well as a factor from their genes and upbringing...All this has to play a part otherwise just having good genes means nothing - at least to a scientist!
16 factors that influences people's intelligence
This article though not VERY scientific kind of sums things a little...