Here you are again, Len, being totally silly, or totally stupid if you will. If they have ethnicity labelled Ashkenazi Jewish DNA it is because it is NOT 100% European DNA (repeat: NOT 100% European DNA). Ashkenazi Jewish DNA is Levantine with an admixture of European DNA which was mixed back in antiquity.
BTW, and for clarification, ethnicity and DNA are not mutually interchangeable words.