No evidence this is true, Stalin did not have a clear policy until postwar WW2, and survivors of the Jewish Eastern European community started proposing Crimea be the Jewish State.

At the Yalta conference in 1945 Stalin did not have a clear plan, but showed Roosevelt disappointment that his Siberian Jewish state was not succeeding. He also shared that he felt the ethnic tensions would cause problems postwar. EDIT: He specifically cited the creation of the KKK in post civil war america

He had a clear understanding of the difficulties of building a new Jewish homeland, and was scared he’d be forced to give up prime land in his own nation that just lost 25 million people.