The influence of classical Aramaic varieties — Syriac on Christian varieties and Targumic on Jewish communities — gives a dual heritage that further distinguishes language by faith. Many of the Jewish speakers of NENA varieties, the Kurdish Jews, now live in Israel, where Neo-Aramaic is endangered by the dominance of Modern Hebrew. Many Christian NENA speakers, who usually are Assyrian, are in diaspora in North America, Europe, Australia, the Caucasus and elsewhere, although indigenous communities remain in northern Iraq, south east Turkey, north east Syria and north west Iran, an area roughly comprising what had been ancient Assyria.