Many Jews of the Byzantine empire, however, escaped compulsory baptism by emigration. They quitted a country in which their forefathers had settled long before the rise of that Church which had so persistently persecuted them. The Jews of Asia Minor chose as their home the neighboring Cimmerian or Tauric peninsula (the Crimea), whose uncivilized inhabitants, of Scythian, Finnish and Sclavonian origin, practised idolatry. These Alani, Bulgarians and Chazars were, however, not jealous of men of other race and of a different belief who settled in their vicinity. Thus, side by side with the Jewish communities which had existed from early times, there arose new communities on the shores of the Black Sea and the Straits of Theodosia (Kaffa), and in the interior, in Sulchat (Solgat, now Eski-Crimea), in Phanagoria (now Taman), and on the Bosporus (Kertch), which lies opposite. From the Crimea the Greek Jews spread towards the Caucasus, and the hospitable countries of the Chazars on the west coast of the Caspian Sea and at the mouth of the Volga (Atel). Jewish communities settled in Berdaa (Derbend), at the Albanian Gates, in Semender (Tarki), and finally in Balanyiar, the capital of the land of the Chazars. By their energy, ability and intelligence, the Greek-Jewish emigrants speedily acquired power in the midst of these barbarian nations, and prepared the way for an important historical event. Hardly thirty years after the fall of the false Messiah, Serene, an anti-Talmudical movement, coupled with Messianic enthusiasm, was again set on foot, but this time on a different scene. The prime mover was a fantastic and warlike inhabitant of the Persian town of Ispahan, one Obaiah Abu-Isa ben Ishak. He was not an ignorant man; he understood the Bible and the Talmud, and was capable of expressing his thoughts in writing. It is said that he was made aware of his call to an exalted vocation by a sudden cure from leprosy. Abu-Isa did not proclaim himself to be the Messiah, but asserted that he was the forerunner and awakener (Dâï) who was to prepare for the coming of the Messiah. His views concerning the office of precursor of the Messiah were, indeed, altogether peculiar. He taught that five forerunners would precede the Messiah, and that each one would be more perfect than his predecessor. He considered himself the last and most perfect of the five, and of equal merit with the Messiah. He assumed his vocation in good earnest, and announced that God had called him to free the Jewish race from the yoke of the nations and of unjust rulers.