The nominal subject of Tractate Avoda Zara is idol worship, one of the worst sins in Judaism. But as Daf Yomi readers complete our third week of studying this tractate, it is becoming clear that the real concerns of the rabbis are much broader than idolatry. In effect, they are aiming to regulate all of Jews' relationships with non-Jews. Nowhere, perhaps, is the gulf between the Talmudic worldview and the experience of modern American Jews more evident than here. American Jews live in a world that, while certainly not free of anti-Semitism, is marked by a historically unprecedented openness and trust between Jews and non-Jews. After all, this is a country where President Barack Obama, a Christian, hosted an annual Passover Seder in the White House.