Have you still not checked out
my other thread that I linked to? I have also done plenty of research. I've found plenty of Jews and others who will attest to it, including some Rabbis. It's not that hard. Jews have similar physical characteristics just like Irish people do, or Russians or Egyptians, etc. A Jew is a Jew because he/she is born to Jewish parents. If he/she also practices the religion, great, but that is not the deciding factor.
"Jews include three groups: people who practice Judaism and have a Jewish ethnic background (sometimes including those who do not have strictly matrilineal descent), people without Jewish parents who have converted to Judaism;
and those Jews who, while not practicing Judaism as a religion, still identify themselves as Jewish by virtue of their family's Jewish descent and their own cultural and historical identification with the Jewish people."
That's from
Christianity vs. Judaism - Difference and Comparison