Despite wide disparities among immigrant groups from different countries and cultures, empirical facts about such differences are seldom part of public debates about immigration policies. The very attempt to discuss such issues in factual terms has been treated as morally unworthy. Any concerns about a need to preserve a domestic culture that has produced a level of prosperity, order and freedom seldom found in some other cultures risks being dismissed as phobias or racism. It is as if the only morally legitimate way to discuss immigration issues is in terms of the prevailing social vision,
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