A mass emigration was politically undesirable for the Soviet regime. In the wake of Israel's victory in the Six-Day War in 1967, the USSR broke off the diplomatic relations with the Jewish state. Anti-Zionist propaganda campaign in the state-controlled mass media and the rise of Zionology were accompanied by harsher discrimination of the Soviet Jews. By the end of 1960s, Jewish cultural and religious life in the Soviet Union had become practically impossible, and the majority of Soviet Jews were assimilated and non-religious.