Israel came into existence because Zionist Jews ethnically-cleansed Palestinians with arms primarily bought from Czechoslovakia brokered by USSR and facilitated by Yugoslavia from 1947 to 1949. US only began arming them in 1962.
>June 1947 to October 1949
>https://en.wikipedia.org/wiki/Arms_shipments_from_Czechoslovakia_to_Israel
Balfour Declaration was three decades earlier in November 1917 and had no effect on Israel's creation in practical and material terms. It's literally a Leftist talking point to do damage-control and distraction for the Warsaw Pact and Yugoslavia. Zionists also parrot it to give Israel a bare minimum sense of legitimacy and to also distract from the fact that they had to shoot, bomb and lynch Brits to get them to abandon Palestine to them when the mandate ended. Britain actually had imposed restrictions on Jewish migration and wanted to hand Palestine back to its Arab majority.
>February 1944 to May 1948
>https://en.wikipedia.org/wiki/Jewish_insurgency_in_Mandatory_Palestine
There were countless agreements between different parties before and during WWI to partition the Ottoman Empire. Who got what ultimately depended on who could force or enforce what. France recognized Israel on January 12, 1949 becaming its main ally in the 1950s, eventually joined by the UK who previously only recognized Israel on April 28, 1950.
Besides the US, the entire Warsaw Pact and Yugoslavia recognized Israel within days or weeks following May 14, 1948, excluding East Germany. Following the June 1967 Six-Day War, all of them excluding Romania nominally broke relations with Israel because the USSR had more Arab allies. Yet, the USSR still let Jews mass-emigrate to Israel starting in 1969.
Even the Ethiopian Jews (Beta Israel) from what's now Eritrea and Ethiopia were from another communist state aligned with Soviet Russia. After the Warsaw Pact ended in 1991, another 1.5 million Jews poured into Israel from the defunct bloc, especially from the former USSR.