It seems to me that you should rely more on the true history book, the bible. In the book of Esther, which was written before the Khazar dynasty it says: 8:17 And in every province, and in every city, whithersoever the king's commandment and his decree came, the Jews had joy and gladness, a feast and a good day. And many of the people of the land became Jews; for the fear of the Jews fell upon them. As the goyim began to practice the Jewish faith, it is a sure thing they began to intermarry with Jews of the bloodline. Therefore when Israel was defeated in 70 AD, this group would have had several centuries to multiply, Then they got pushed further north into the area known as the Khazar empire. And of course from there, pushed into Europe and eventually the US.
North Korea insists it 'regrets,' not apologizes, over mine blast that killed 2 South soldiers (AP)
from the article: The Jewish people's ultimate treasure hunt