He had been recruited by the pioneering Zionist leader Kurt Blumenfeld, who paid a call on Einstein in Berlin in early 1919. “With extreme naïveté he asked questions,” Blumenfeld recalled. Among Einstein’s queries: With their intellectual gifts, why should Jews create a homeland that was primarily agricultural? Why did it have to be its own nation-state? Wasn’t nationalism the problem rather than the solution? Eventually, Einstein came around. “I am, as a human being, an opponent of nationalism,” he told Blumenfeld. “But as a Jew, I am from today a supporter of the Zionist effort.”
via How Einstein Divided America’s Jews – Magazine – The Atlantic.