In the 1950s, the Soviets saw Israel as a potential 'friend.'
The Soviets changed their mind in the 60s and began working overtly and covertly to undermine and destroy Israel.
Most of the crap they preach about Israel, "The Palastinians" and the entire Mideast even today, is nothing but rehashed KGB propaganda from the 60s and 70s.
That was actually the late '40's. Before Stalin died the Communists were already executing "Zionists" and "Israeli spies," and they were supporting Arab Communists like Nasser very early on.