Terumah: The Secret to Jewish Survival, The Deal with Emperor Vespasian, The Wandering Jew, 2000 Years of Exile, Ben Gurions 1937 Speech at the Peel Commission, How did we make it?

The most fascinating commandment in this weeks Parsha is regarding the transportation poles of the Ark. Why was it so essential? Why did Rabbi Yochanan Ben Zakkai believe that Yavnah was important to be saved?