From “Who Are You, People of Israel”:
Once the people of Israel, Abraham’s disciples, left Babylon, they lived in unity for approximately 2,000 years. During that period, they experienced troubles, but throughout those years, unity was the key tenet that kept the people together, and their conflicts were meant only for the purpose of intensifying the love among them.
However, approximately 2,000 years ago, the ego erupted among them with such intensity that they could not maintain their unity. Unfounded hatred and egotism broke out among them and inflicted an exile upon them. This exile, more than anything else, is exile from unity.
The alienation within the Israeli nation caused them to disperse among the nations. In addition, the separation among them caused Kabbalists to conceal their wisdom, which then became the secret of a chosen few Kabbalists in each generation.
The complete text of the brochure is here.