To Flee or to Stay?

This is an article from Hakirah volume 9.
The obvious question is this: Why, in the early to late 1930s, when the circumstances and conditions on the ground were more favorable for the Jews of Europe to move to Palestine, did the majority not go?
This subject always touches raw nerves, and has been complicated for political, religious, and ideological reasons, not to mention several complex psychological factors including guilt, shame, and anger.