One can deplore or applaud Arizona’s new get-tough law cracking down on illegal immigrants, but rational debate is not served by Cardinal Mahony’s characterization of the new law as the kind of tactic used by Communists and Nazis. Nor is rational debate served by the Federal government’s head-in-the-sand approach to the problem of illegal immigration. Readers may recall how quickly the question of immigration faded from view during our last presidential campaign. Frankly, nobody knew what to say about it. Or at least nobody knew how to say anything effective that would also be popular.