A few Anons have posted various media articles as sauce
Claiming that Ashkenazi Jews originated in northeast Turkey.
This is not exactly what the researcher discovered.
Yes, Ashkenazi DNA does match with a cluster of locations on the Silk Road trade route in northeast Turkey, and apparently there used to be villages in the area with variations of the name Ashkenaz which is cognate with Ashgyz meaning Scythian,
But this is NOT the origin of the Jews. The author of the paper even mentions that Jews in the Persian empire tended to settle along the Silk Road trade routes. So the actual origins of the DNA, which is closer to Turkish and Kurdish, are most likely further east.
What he really pinpointed was that the huge population of Ashkenazi Jews in southern Russia and Ukraine, came from northeast Turkey near Trabzon which was an important Silk Road hub. A lot of the findings in his paper are actually not about DNA but about the complexities of Yiddish which is not a simple language inherited from parents but some kind of creole or trade language that is an amalgam of many sources.
One thing that he does not get into, is whether Yiddish might in fact, be the origin of the German language.
See for yourself. The paper that is at the root of all the media articles is attached. The villages no longer exist on official maps, but one of his maps show them clustering along the E97 highway route south from Trabzon.