While the Soviets did support Israeli independence and gave the okay for Czech arms to go to Israel, it's not really plausible to get a Communist Israel (the Israeli Communist Party never really amounted to that many seats). And besides, Israel was socialist from independence until 1977. You could get an Israel that's more social-democratic and neutral, like India or Finland, but out-right communist isn't really possible. At best, Israel would be "pink", social-democratic, probably in the Non-Aligned Movement, most likely close to France (they were Israel's main backers until 1967 when the Americans took over), and trying to balance their relations with Western Europe and the Soviets.
The Israelis would get Soviet tech if they're a Soviet ally, but not the Soviet playbook. They made do with American, French, and British tech, and got pretty far with it too, so it stands to reason they'd find a way to use Soviet military tech to their advantage.
You'd have to do something about Stalin though, as he was massively antisemitic. The Doctor's Plot conspiracy theory and the Night of Murdered Poets helped create a new atmosphere of anti-Semitism in the Soviet Union. So either Stalin drops dead a lot sooner (say 1946, when Andrei Zhdanov could succeed him) and the Soviets criticize anti-Semitism and takes steps to stamp it out, or the Soviets accept Zionism as a form of self-determination rather than "bourgeois nationalism".