I'm Ashkenazi, and I say that's bunkum. I am very suspicious of racialized claims of intelligence. For one, IQs are not fixed -- despite the claim by many that IQs measure some kind of innate ability, people with better educations regularly do better on intelligence tests than people with less education.
You can make a very solid argument that there are cultural factors that cause Ashkenazim to value education more than some other groups -- and that may well translate into higher IQ scores. But I don't think that's the same as intelligence.
People who go for more education are generally higher in IQ in the first place. You can’t raise IQ effectively just by educating people!
Anyway, even if you are not convinced that there is such a thing as native intelligence, then let’s consider culture. The Moslem culture must be pretty terrible to come up with results like these. I think that is the case.
I have met some rather intelligent Moslems. One, in particular, was also a very likeable and tolerant person. Some of the others were paranoid creeps. People differ.