Jews are not unique in history in having serious internal dissension.
Such dissension is what led to the destruction of the first Temple and the dispersal of Jews throughout the Middle East. It is also what led to the writing of the Torah and several of the additional stories to explain to the Jews of the future how dissension had resulted in defeat and dispersal. There would be no Jews today if Cyrus had not allowed them to return to Israel.
The same dissension later led to the battles of the Maccabees and the celebration of Hanukkah. And the destruction of the second Temple.
Jews did not learn the lesson over the intervening two millennia. There were many instances where Jews battled each other theologically, politically and in competing organizations. Even when they were building the State of Israel.
The survival of Jews in Israel required cooperation. The new state of Israel began with extensive dissension among the settlers. It was the hostility, now a century old, of the surrounding Arabs that has forced Jews to learn internal tolerance.
Israel survives because it is a cohesive nation, more cohesive than any other. It is cohesive because it is surrounded by obvious dangers and belligerent enemies.
Because one third of American Jews do not understand the situation in Israel, I can look forward to a long-term separation of a large part of American Jewry from the future of Israel. Many American Jewish communities will begin to resemble overseas Chinese and Japanese communities... arcane and completely detached from the homeland.