Once upon a time, Baghdad was home to a flourishing Jewish community. More than a third of the city's people were Jews, and Jewish customs and holidays helped set the pattern of Baghdad's cultural and commercial life. On the city's streets and in the bazaars, Jews, Muslims, and Christians--all native-born Iraqis--intermingled, speaking virtually the same colloquial Arabic and sharing a common sense of national identity. And then, almost overnight it seemed, the state of Israel was born, and lines were drawn between Jews and Arabs. Over the next couple of years, nearly the entire Jewish...