Would they be given weapons? And we have to remember that Jews weren't given Palestine, but where instead giving a passing nod that they could own half of it. The half including all the places with Jewish settlements, plenty of areas still with Palestinians everywhere, PLUS the empty Negev. They ended up needing to militarily take and hold the land themselves. The Soviets orchestrated pogroms in Poland to discredit Poles, though I believe high Polish church members and others refused to accept that the Jews didn't have it coming or something. It came from a quote where a bishop or cardinal refused to denounce the violence. Also, why would the Soviets depopulate an area just for Jews? They wanted Kaliningrad for themselves so they had an ice-free Baltic port (this was at the time when there was still the fiction going on that the Baltic states hadn't been annexed by the Soviets) and the Poles were needing to be paid off somewhat from the loss of their land, and so they had somewhere to put all the Poles and and Ukrainians from their land. They did put a lot of their own Ukrainians in Pomerania and Silesia, though as they gave them money, nice buildings, and larger farms they did better than the when the Russians ethnically cleansed their half of Galicia and dumped everyone in tundra without buildings. Also, we need to look at how the Soviets kept eliminating groups deemed foreign. Before and during WWII foreign communists were constantly murdered, and basically any group in the border would be almost completely removed, until or unless a Soviet SSR or puppet state was made, at which point they might be dumped there. I don't see their being enough Polish Jewish left to form a strong state, and given how the Soviets called Jewish groups Fascists if they said the Holocaust had a focus on killing Jews rather than liquidating 'surplus workers'. That was mostly during the time of Stalin and such, though. Afterwards when things settled down Jews were probably just expected to stay put, and not ever ask if they could leave, lest they be deemed Zionists. The Soviets might welcome foreign Jews to whatever this independent state would be, but I imagine it would end up like all the other times they offered amnesties, or tried getting Russians, Armenians, and others to come 'home'.