Your sources, Preston James and Mike Harris, are wrong on every claim they didn't plagiarize. There was no Khazaria in 1250 and Persia had been razed by the Mongols and was part of their empire. In 1250, there was no Kievan Rus. The Mongols had conquered it a decade earler. There was also no Khazaria in 1250. The last Khazar state was destroyed in 1016, and its ruler was the Christian Georgius Tzul.
In 750, Persia was part of the Islamic Caliphate, not an independent nation. In 737 CE, the Caliphate won the Third Arab-Khazar War with a sneak attack, killing the Khagan Bek and imposing Islam. The Khazars were allies of the Christian Eastern Roman/Byzantine Empire and fought the Caliphate in three wars over a century. The Rus wre in no position to impose anything on Khazaria. They were Swedish and related traders around modern St. Petersberg and what is now Finland. The first Rus state was the Rus Khaganaate centered around Holmgard (Vielky Novgorod) in the late 8th century. They didn't hate the Khazars. They modeled themselves on the Khazars, using the same form of government, a Khaganate, which had a ceremonial religious leader, the Khagan, and a secular leader, the Khagan Bek (chief noble.)
Khazaria had no king. It had a Khagan who was a ceremonial leader and religious leader in Tengrist Shamanism, as a member of the Ashina Clan. The Ashina clan claimed to be descendants of the Tengrist Wolf diety (Asena) and had been the ruling family in the previous Gokturk Khaganate. In 740 the partial conversion to Judaism actually occurred. Khagan Bek Bulan, who held a role similar to a Shogun, converted to show independence from the Christian Eastern Romans and Islamic Caliphate. But the Khagan remained a Tengrist Shaman and the most Khazar nobles, most Khazars, and most Turkic people in the Khazar Khaganate remained Tengrist. Only a small nuber of Khazar nobles converted and married ethnic Jews. Khazaria had a pre-existing Jewish population and Jewish traders. Moreover, in the 9th century, Jews fled to Khazaria from the Byzantine and Islamic Empires. In so far as Khazarian means "relating to the Khazar Empire, most Khazarian Jews were not ethnic Khazars. Most Khazars converted to ISLAM. The myth that Ashkeanzi Jews are Khazars has been disproven by history, linguistics, and genetics.
As I've said earlier, cant about the Rothschilds was Communist propaganda since Marx. So screaming about Khazarian Rothschilds is not only a non-sequitur and false, but double Soviet propoganda.
Most Israeli Jews are not Ashkenazi, but Mizrahi and Sephardi. Preston James doesn't know human genetics from those of a slime mold.
Are you aware how much the perceived credibility in establishment history has fallen, and how far it has yet to fall?
There’s a good reason for this decline in credibility. It’s deception, a house built on sand. The storm washes the sand away and the house collapses.
Take note: the terms “conspiracy” and “conspiracy theory” also have lost their meaning. This is because they were wielded as a weapon, to protect the lies of the cabal, for so long.