::I do not have to prove anything about myself personally, I have offered you a copy of Poliak book, which I have and which is indeed unusable for direct Wikipedia edition as it is not available online.What I also wanted to point out with this offer, is that contrary to myself you never red Poliak, but you relay on secondary and Tertiary claims about his books. Concerning Moshe Gil, personally I do not agree with his views, however he is a well known academic expert from this field, his work did not created any criticism and his views are not less fringe than the Khazarian Theory itself (btw Israel Bartal and Anita Shapira, the two leading contemporary Jewish historians, whose texts about Khazars I also have, are very close in their opinion with Gil. 
 To summarize if anyone is interested in my personal opinion, based on material I have red I believe that some form of Judaism adoption/conversion was present among Khazar royalty. What is disturbing here is that the fact that what all non partisan and neutral historians stated from Dunlop to Bernard Lewis claims, namely that Khazar theory is not historically validated theory is somehow omitted from this article. To elaborate how old which author was, whether they rote their books before or after Elhaik home made analysis (probably most of historians never heard about him) in which year they made their works and weather it was before or after Sand era, is beyond the scope of  my work here). 
 Again if anyone is interested to receive Poliak book, translated to English, contact me through Wiki mail. I am ready to send it through post.