In regards to the first: probably not, Europe was still relatively anti-Semitic in accordance with modern standards, and from their perspective, want a bit of an “out of sight, out of mind” approach to a Jewish state. The Jews on the other hand were very… insistent on having their homeland in the Holy Land.
In regards to the second point… it was attempted IOTL by the Soviets, but they made the Autonomous Jewish Oblast in Siberia, where the Jews didn’t want it, and it was mostly a Yiddish state.
So to have it succeed, you’d need the Soviets to establish the AJO in good faith, which would probably place it either near Crimea, or in the Caucasus (if I’m remembering correctly where the concentration of Soviet Jews was and where they wanted the Oblast to be situated).