GR translation: A racial affinity for the books, the theory

[Mike Jing]

V163.6-9, P165.33-36   Not much of the Jew in her. Why are half the
Leftists she knows Jewish? She immediately reminds herself that Marx was
one. A racial affinity for the books, the theory, a rabbinical love of loud
argument . . . She gives the crust to her child, picks her up.

Here the "racial affinity for the books" means the love for learning in
general, right? The published translation interprets it as Jews are
attracted to Marx's books and theory because Marx himself is a Jew, which I
don't think is what's intended here.