Finkelstein: When one reads one of Rutherford's books he wrote on the subject in 1925, he was certainly taking the position as a pro Zionist.
Kaik: Some of the ideas in that book are truly ridiculous as Rutherford lacked any understanding of Jewish faith and history. For example he said that Jews must accept NT and Messiah insisting that Satan had blind them etc.
I think it may be more helpful to use the term dual covenant theology instead of Zionism when discussing the difference between Russell's Zionist stance and Rutherford's movement towards a California based Jerusalem.
Russell's doctrine put forth the view that Jews had a separate, special covenant with 'God', and that the Christians had their own, separate covenant. Hence, Russell's doctrine was a dual covenant understanding that did not require the conversion of Jews to Christianity, or their acceptance of the Messiah.
And that is where Rutherford's doctrine differed sharply - his was a replacement doctrine that required the Jews to accept the NT and the Messiah. It would take a few more years before Rutherford dropped the "return to Palestine" and replaced that holy place with his mansion, but he had already veered sharply away from Russell's dual covenant doctrine by his statements requiring the Jews to "accept the Messiah". in 1925.
Rutherford replaced the Jews in the covenant doctrine with the Jws. Replacement doctrine.