Its a very convoluted body of research that doesn’t lend itself to any quickly discovered “Aha!” answers that end the debate. But you can glean some useful info from scanning through the plain English challenged academic writings below:
https:// geneticliteracyproject. org/2013/10/08/ashkenazi-jewish-women-descended-mostly-from-italian-converts-new-study-asserts/
https:// genomebiology. biomedcentral. com/articles/10.1186/gb-2009-10-1-r7
https:// www. jpost. com/Israel-News/Politics-And-Diplomacy/New-law-says-genetic-test-valid-for-determining-Jewish-status-in-some-cases-506584
Basically, Ashkenazi’s are easily distinguishable as related to each other…and they don’t originate from the Middle East, but instead come from Europe or Eastern European areas.