It could be a confluence of interests.
A Strategy for Israel in the Nineteen Eighties by Odid Yinon published by World Zionist Organization
"The dissolution of Syria and Iraq later on into ethnically or religiously unique areas such as in Lebanon, is Israel's primary target on the Eastern front in the long run, while the dissolution of the military power of those states serves as the primary short term target. Syria will fall apart, in accordance with its ethnic and religious structure, into several states such as in present day Lebanon, so that there will be a Shi'ite Alawi state along its coast, a Sunni state in the Aleppo area, another Sunni state in Damascus hostile to its northern neighbor, and the Druzes who will set up a state, maybe even in our Golan, and certainly in the Hauran and in northern Jordan. This state of affairs will be the guarantee for peace and security in the area in the long run, and that aim is already within our reach today."
"Iraq, rich in oil on the one hand and internally torn on the other, is guaranteed as a candidate for Israel's targets. Its dissolution is even more important for us than that of Syria."
"Every kind of inter-Arab confrontation will assist us in the short run and will shorten the way to the more important aim of breaking up Iraq into denominations as in Syria and in Lebanon."
A Clean Break: A New Strategy for Securing the Realm is a policy document that was prepared in 1996 by a study group led by Richard Perle for Benjamin Netanyahu, the then Prime Minister of Israel.
Richard Perle- Chairman of the Defense Policy Board Advisory Committee Bush Administration In office 2001–2003
"Israel can shape its strategic environment, in cooperation with Turkey and Jordan, by weakening, containing, and even rolling back Syria. This effort can focus on removing Saddam Hussein from power in Iraq — an important Israeli strategic objective in its own right — as a means of foiling Syria’s regional ambitions."
"it is both natural and moral that Israel abandon the slogan comprehensive peace and move to contain Syria, drawing attention to its weapons of mass destruction programs, and rejecting land for peace deals on the Golan Heights"
Who's lobbying for the US to topple Assad? The same folks that brought you Iraq and Libya.
No point in dragging up the rest of the motley crew, just watch the BBC documentary, "The War Party."
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