[Jacob Kell]

Not all. Look at Lazar Kaganovitch. He was a Jew and he apparently remained in Stalin’s favor until Joe’s death. Kaganovitch died in 1991, and he was one of the original Bolsheviks.

[rmlew]

Stalin kept a Jewish henchman as his killer. He got to murder Soviets of all ethnicities and use Kaganovich as a shield to deflect anger onto his Jewish antisemite. This was meant to help with ignorant Soviets with old antisemtic pathologies, but it seems to work with Westerners too.
Judaism was banned in the USSR just like Christianity. Stalin turned away Jews fleeing the Nazis and sent others into Gulags. Only when Hitler invaded did he drag them into the front lines to be canon fodder. Stalin planned to send Jews on a death march to Siberia when he died. Look up the "Doctor's Plot"