The Immigration<span> limited the number of </span>immigrants<span> allowed entry into the United States through a national origins </span><span>quota</span>
Strong nationalism
The Jews were always proud of their nationality which they held as divine ordained through the promises Yahweh had given their patriarchs Abraham,Isaac and Jacob. This sense of divine significance maintained their spirit of nationality that has survived and spanned three millenniums.
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The first one I would believe