It's easy for New York politicians to pronounce against Arizona's new illegal-alien law. They're 2,000 miles away from the socially corrosive consequences of a failed economy -- and a raging, narcotics-fueled border war that has already claimed some 23,000 lives. But just imagine how sanguine they'd be if a half-million poverty-wracked economic refugees flooded the city from Canada -- or, maybe more to the point, from New Jersey. And if the federal government refused to enforce existing immigration laws. Not very, we imagine. So they blithely call for anti-Arizona boycotts and divestment. And ugly allusions to South African apartheid roll...