That’s why I think it’s worth discussing further since this is a theory floating around. Need sauce before you hard claim anything. Though it’s interesting rumor.

I appreciate your introducing me to some of these details. I have to concur with your first source when it says, "Suffice to say that the misinformation on the internet far outweighs the truth." Your next two sources repeat the same narrative as the first in very similar words. The second source, in part I, quotes Q as saying, "Britain and Israel will be last", which is a mistake because Q is deliberately easily searchable and did not say this. Q actually said in #916, "We are saving Israel for last" (no Britain).

Your last source gives a neutral reading and then draws a reasonable tentative conclusion: "Some ethnic Jews lived in Khazaria (and many other places) during the Middle Ages. In or near 740, a Khazarian king converted to Judaism, for personal, practical, or political reasons, and he brought some of his subjects with him. When the power of Khazaria diminished and the empire fell, many Jews—both ethnic and proselytes—left that area and, settling in Jewish communities elsewhere, merged with the local population. Such intermarriage between ethnic Jews and Gentile proselytes does not mean that Jews of Khazaric background are any less Jewish than other Ashkenazi."

I see no reason to create an entity name "Khazarian Mafia" and attribute it to a secret group. No Khazars exist today. If the claim is that Ashkenazi Jews are largely Khazarian rather than slightly, then call them what they call themselves, Ashkenazi Jews. If the claim is that a mafia is largely Ashkenazi rather than slightly, then call it a partly-Ashkenazi mafia (lowercase). Both those claims are rather excessive and all your sources lack any specificity. But you see that even sticking to the known facts would both lose the sensationalist "benefit" and not remove the racially-based focus that is the detriment of the theory.

The people chosen by God in Jesus, and all men of good will, are fighting a spiritual enemy who uses human shields. Truth is our weapon and defense, as it shines light on the enemy. Compounding spiderwebs of nebulous connection with racially based charges does not assist us and is not of us. As someone who has stuck to facts about the Khazars and Rothschilds for a long time, I reject narratives that do not demonstrate connection to truth. I'm looking forward to better evidence of propositions in the future.