Only a smal selected strata of the Khazarian nobility converted to Judaism. Their influx into the main Hebrew world-population must be considered as having a minute impact. Like for instance the influx of Arabs from the peninsula on the Hebrew Palestinians who later on converted to Christianity and Islam. Modern genetics disprove the concepts brought forward by Arthur Koestler, and his theories are at most intersting in an attempt to study small external populations intermarried with the large main body of Hebrews.
Nigeria rescues 71, mostly women and girls, from Boko Haram (AP)
from the article: Perhaps Arabs can save Hebrew from demise