http://en.wikipedia.org/wiki/KhazarsConversion of the royalty and aristocracy to JudaismJewish communities had existed in the Greek cities of the Black Sea coast since late classical times. Chersonesos, Sudak, Kerch, and other Crimean cities sustained Jewish communities, as did Gorgippia, and Samkarsh / Tmutarakan was said to have had a Jewish majority as early as the 670s. Jews fled from Byzantium to Khazaria as a consequence of persecution under Heraclius, Justinian II, Leo III, and Romanos I.[97] These were joined by other Jews fleeing from Sassanid Persia (particularly during the Mazdak revolts),[98] and later from the Islamic world. Jewish merchants such as the Radhanites regularly traded in Khazar territory and may have wielded significant economic and political influence. Though their origins and history are somewhat unclear, the Mountain Jews also lived in or near Khazar territory and may have been allied with the Khazars, or subject to them; it is conceivable that they, too, played a role in Khazar conversion.
At some point in the last decades of the 8th century or the early 9th century, the Khazar royalty and nobility converted to Judaism, and part of the general population may have followed.[99] The extent of the conversion is debated. The 10th century Persian historian Ibn al-Faqih reported that "all the Khazars are Jews." Notwithstanding this statement, most scholars believe that only the upper classes converted to Judaism;[100] there is some support for this in contemporary Muslim texts.[101]
Contemporary historians provided much detail about the religion and daily life of Khazars. One of the most detailed descriptions of Khazars came from Arab historian Ahmed ibn Fadlan, who traveled to Khazaria in 922 as the emissary of the Baghdad caliph. According to his account the majority of Khazars were Muslims and Christians, while the Jewish population represented a minority in the kingdom. According to ibn Fadlan, contrary to non-Jewish Khazars, the king and his royal court were Jewish. Ibn Fadlan claimed that 100,000 Muslims lived in Khazaria, and thirty mosques were established there. He also described a strong pagan community consisting mostly of Slavic peoples. Regarding governance, Ibn Fadlan wrote that judges were elected equally from Christian, Jewish, Muslim, and Pagan communities.[102] Dmitry Vasilyev, a professor at Astrakhan State University who excavated sites associated with Khazars, states that after the fall of the Khazar empire, "Khazars were slowly assimilated by Turkic-speaking tribes, Tatars and Mongols."[103]
The Khazars enjoyed close relations with the Jews of the Levant and Persia. The Persian Jews, for example, hoped that the Khazars might succeed in conquering the Caliphate.[104] The high esteem in which the Khazars were held among the Jews of the Orient may be seen in the application to them, in an Arabic commentary on Isaiah ascribed by some to Saadia Gaon, and by others to Benjamin Nahawandi, of Isaiah 48:14: "The Lord hath loved him." "This", says the commentary, "refers to the Khazars, who will go and destroy Babel" (i.e., Babylonia), a name used to designate the country of the Arabs.[105] From the Khazar Correspondence it is apparent that two Spanish Jews, Judah ben Meir ben Nathan and Joseph Gagris, had succeeded in settling in the land of the Khazars. Saadia, who had a fair knowledge of the kingdom of the Khazars, mentions a certain Isaac ben Abraham who had removed from Sura to Khazaria.
Likewise, the Khazar rulers viewed themselves as the protectors of international Jewry and corresponded with foreign Jewish leaders. The letters exchanged between the Khazar ruler Joseph and the Spanish rabbi Hasdai ibn Shaprut have been preserved. They were known to retaliate against Muslim or Christian interests in Khazaria for the persecution of Jews abroad.[citation needed] Ibn Fadlan relates that around 920 the Khazar ruler received information that Muslims had destroyed a synagogue in the land of Babung, in Iran; he gave orders that the minaret of the mosque in his capital should be broken off and the muezzin executed. He further declared that he would have destroyed the mosque entirely had he not been afraid that the Muslims would in turn destroy all the synagogues in their lands.
The theory that the majority of Ashkenazi Jews are the descendants of the Khazar population was advocated by various racial theorists[107][108] and antisemitic sources[108][109][110][111] in the 20th century, especially following the publication of Arthur Koestler's The Thirteenth Tribe. This belief is still popular among groups such as the Christian Identity Movement, Black Hebrews, British Israelitists, and others (particularly Arabs[112][113][114]) who claim that they, rather than Jews, are the true descendants of the Israelites, or who seek to downplay the connection between Ashkenazi Jews and Israel in favor of their own.