[nickff]

US law/regulatory policy may be a good measure, and is definitely less xenophobic than than of many/most European governments. The best example is what happens with refugees and immigrants, who are treated as interlopers in France; American policy is 'skeptical' of refugee claimants, but much more likely to permit them to settle and work if the claim is accepted.

[tptacek]

To say nothing of the fact that their children born in America are natural-born citizens of the United States, unlike almost every other similarly industrialized/wealthy country (the Maple Leaf State doesn't count!).