There's an interesting question what Stalin's religion was.
Lazar Kaganovich was a Jew that persecuted Jews on behalf of Stalin. It calls to mind Roy Cohn who persecuted Jews on behalf of McCarthy.
I have a biography entitled 'The Wolf of the Kremlin'
that claims Lazar Kaganovich had Stalin poisoned and facilitated Khruschev's rise to power,
although I have not researched it's veracity to the same extent as Stalin's Tsarist era Okhrana work.
The deportation of Russian Jews in the late 1940's and 1950's worked in Zionism's favor in the same basic way that the deportation of comparatively wealthier German Jews worked in Zionism's favor in the 1930's. It would be interesting to know if the Soviet Union had some kind of agreement with the Zionist movement or the state of Israel facilitating the transference of Russian Jews to Palestine like the Nazis had in fact established back in 1934.
In that connection, it would also be interesting to see if Soviet relations with Zionism changed any with Khruschev.
They certainly improved with Yugoslavia.