Most were outward adherents of Islam, but had second names and would not intermarry.

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They are blurring anyway, as families intermarry and politics moves towards the middle ground.

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These people are not only rich but also exceptionally clever, because America has become expert at sending its brightest to the same elite universities, where they intermarry and confer on their offspring not just wealth but also a cognitive advantage that gives this class terrific staying power.

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Among those who went to Sunday school, the proportion dropped to 29%, and among those who attended Jewish day school to 7% although part of the reason may be that the Orthodox, who almost all go to day schools, are the least likely to intermarry anyway because they still see marrying out as a sin.

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