ENOUGH Emma Lazarus. For many of us, the definitive pro-immigration speech comes from Bill Murray in "Stripes": "We're all very different people. We're not Watusi, we're not Spartans, we're Americans. With a capital 'A.' And you know what that means? Do you? That means that our forefathers were kicked out of every decent country in the world. We are the wretched refuse. We're the underdog. We're mutts…. But there's no animal that's more faithful, that's more loyal, more lovable than the mutt. Who saw 'Old Yeller'? … I cried my eyes out." Murray's speech may lack poetry and intellectual rigor,...