(1) Judaism is a uniquely evil religion. Christianity: anyone can convert, though exceptions have often been made to exclude people. Defined by belief. Islam: anyone can convert. Defined by belief. Judaism: Primarily defined by blood quantum. Conversion discouraged and reluctant.

(2) Judaism was practicing something akin to racial blood quantum based exclusion before race even existed. It's not a surprise that it lent itself so easily to ethnic supremacism in Israel, because it already had all the building blocks in place long beforehand