Im astounded by the simplistic understanding of some members that ethnicity equals DNA.
Ethnicity is determined by heritage, language, culture, religion, ideologies, and yes genetics to certain degrees.
Jews answer all the criteria, not only that but the Jews are a historical NATION with standing kingdoms, standing armies, common language, common practices, and a common historical geographic land.
Israel is the ONLY, yes ONLY country in the world where people speak Hebrew, incidentally it is also the ONLY Jewish country in the world. Various ethnic groups around the world are taking the Israeli method of language revival, including Celtic people in Great Britain who wish to prevent the loss of their heritage and who are fighting to preserve their ethnic languages.