"Practicing Jews, in Palestine and in the UK and in most of the US (though perhaps not all?), were virulently anti-Zionist until long after the creation of Israel."
Absolutely true. Only started changing in 1967.
.... Across the political spectrum, American Jewish intellectuals proved especially indifferent to Israel's fate. Detailed studies of the left-liberal New York Jewish intellectual scene through the 1960s barely mention Israel.[16 See, for example, Alexander Bloom, Prodigal Sons (New York: 1986)]
Just before the June war, the AJC sponsored a symposium on "Jewish Identity Here and Now." Only three of the thirty-one "best minds in the Jewish community" even alluded to Israel; two of them did so only to dismiss its relevance.[17 Lucy Dawidowicz and Milton Himmelfarb (eds), Conference on Jewish Identity Here and Now (American Jewish Committee: 1967)]
Telling irony: just about the only two public Jewish intellectuals who had forged a bond with Israel before June 1967 were Hannah Arendt [18. After emigrating from Germany in 1933, Arendt became an activist in the French Zionist movement; during World War II through Israel's founding, she wrote extensively on Zionism] and Noam Chomsky.[18 cont ... The son of a prominent American Hebraist, Chomsky was raised in a Zionist home and, shortly after Israel's independence, spent time on a kibbutz ... Both the public campaigns vilifying Arendt in the early 1960s and Chomsky in the 1970s were spearheaded by the ADL. (Elisabeth Young-Bruehl "Hannah Arendt" [New Haven 1982], pp.105-8, 138-9, 143-4, 182-4, 223-33, 348; Robert F. Barsky, Noam Chomsky [Cambridge 1997], pp.9-93; David Barsamian (ed.) "Chronicles of Dissent" [Monroe, ME: 1992] p.38)]
Then came the June war. Impressed by Israel's overwhelming display of force, the United States moved to incorporate it as a strategic asset. (Already before the June war the United States had cautiously tilted toward Israel as the Egyptian and Syrian regimes charted an increasingly independent course in the mid-1960s.) Military and economic assistance began to pour in as Israel turned into a proxy for US power in the Middle East. See "Holocaust Industry", Finkelstein, p.18