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Superior means nothing, the human-kind might be superior to the cat in terms of braincase but has much weaker developed eyeshot.
The askhenazi jewish are the current financial-intellectual elite of the Western ''Zivilisation'' and they have indeed an higher IQ than the averege european and better living conditions on averege.
But jews aren't an homogeneus bunch, there are black and middle eastern jews like the Falasha, and they have much lower IQ and living condition than the averege european.
When Europe was at the top of her ''kultur'' and the aristocracy was formed by germanic derived nobles the jewish lived segregated but after liberal revolutions they gradually take power in the society especially using their economic power.
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