Israel does not intervene in internal affairs of neighboring countries. Let me say this: there is no Arab country--including Somalia, Mauritania, and Oman--in which Israel has not intervened since its usurpation of Palestine. "
The war's secondary aim (again, as Barak defined it ) also served the defense minister as a basis for his military doctrine: We must not intervene in a neighboring country's internal affairs. Fact: We failed in our attempt to put our Christian allies into power in Lebanon." (thanks Olivia)