#1 That’s why I asked the question.
#2 Most “Progressive” people of any descent hate religion
#3 Jews trace their lineage through the Mother. It’s the only true way to know since the Father could be anyone in the surrounding area I guess.
Antisemites have no problem pointing to Karl Marx’s patrilineal descent to tag him as a left-wing “Jew” (grandfather was rabbi of Trier; father converted to Lutheranism).
And Moore’s descent is no secret, nor is it too hard to determine the Gaelic roots of his last name (from Irish “Ó Mordha”).