Re: Percentages of ancestry - my Ashkenazi father seems to be partly of Italian/Greek descent? #dna
Ethnicity is used as a way to sell tests but not the most reliable part of testing - as Others have said. And if you are even 1/2 Jewish as I am your Jewish "cousins" may be much farther out than what the program says. FTDNA does adjust for this to a degree. For more info on ethnicity estimates see Judy Russell's most recent post on this topic. https://www.legalgenealogist.com/2019/01/27/and-still-not-soup/
She has several others usually with something about soup - Like not soup yet - etc.
And there are more!
My newest estimate from FTDNA's last update erases all my German ancestry on my mother's side and Judy had this same issue at one time and still does. Now I am Scandinavian. Understanding immigration patterns and the movement of Germanic tribes can help explain part of this.