In the beginning, Israel was our potential military staging area should the USSR continue it's push through the Caspian Sea.
To which time period does your "in the beginning" refer? And what evidence is there to support the assertion that the U.S. ever intended to use Israel as a military staging area?
An interesting twist, to be sure; it's hardly as sensible as supporting Arab nations would have been, if our only interest was oil, but it's an entertaining digression.
Of course, sitting squarely in the path of this excursion is the USA's history in relation to Iran. Which country, not coincidentally, sits squarely in the path of the USSR's path from the Caspian Sea to the Indian Ocean. (Which would then, of course, have provided it with coveted warm-water seaports.)
On the topic of Cold-War containment, scholars are unanimous (as I'm sure you know) in indentifying the CIA's overthrow of Prime Minister Mohammad Mosaddeq in Iran and subsequent installation of Shah Reza Pahlavi as the USA's principal intervention in the region you identify. In 1951, Iran's Parliament had voted to nationalize its oil industry--a move always certain to infuriate the U.S. and its oil companies--and legislators elected Dr. Mosaddeq as prime minister.
The fears of the American leadership at the time (both Truman's and especially Eisenhower's administrations) focused generally upon both the supply of oil and the possible spread of Communism. Nationalizing the oil supply threatened in both regards. The CIA, as part of its destabilization program, directed a campaign of bombings by Iranians posing as members of the Communist Party and of course funneled untold millions to Pahlavi and his minions, much as we're now doing in Iraq and Afghanistan. In this way they sought (and succeeded, I think) to foment some degree of public dissatisfaction with and, utlimately, rebellion against, the Prime Minister.
However, the signal event was the approach of an Iranian military general to the CIA via the American Embassy in Tehran. What ultimately resulted has been called the CIA's first overthrow of a major government, and was used, unfortunately, as a blueprint for later fiascos such as the ones in Cuba and Guatemala. Of course, naturally, it was sold to the American public as a "liberation" and "birth of freedom" etc. Needless to add, the Iranian people didn't quite see it that way and sort of resented the autocratic Shah and his band of SAVAK torturers and murderers.
At this point popular history picks up and I need hardly describe the animosity which has prevailed between the US and Iran ever since. US Secretary of State Madeleine K. Albright acknowledged the coup's pivotal role in the troubled relationship and almost even apologized for it, something our current rulers would never do except perhaps if they were waterboarded:
"The Eisenhower administration believed its actions were justified for strategic reasons," she said. "But the coup was clearly a setback for Iran's political development. And it is easy to see now why many Iranians continue to resent this intervention by America in their internal affairs."
And of course, as I mentioned, a quick glance at any map of the Middle East shows that it is Iran, not Israel, in the way of any supposed push by the Soviet Union from the Caspian Sea to the Indian Ocean.
Once again, I invite anyone reading to imagine if the tables were turned, and another country had meddled in your country's affairs to this extent, involving an overthrow of your government, theft of your natural resources, and decades of tortures, murders, and disappearances, etc. etc. Who knows, you might resent it too.
There's much more, of course, but more than 50 years after the event, the CIA still maintains strict secrecy in relation to many important documents. Meanwhile, available sources include:
Secrets of History: The CIA in Iran - Empire? - Global Policy Forum
History of Iran: A short account of 1953 Coup
Did the CIA give Iran the bomb? Extracts from New York Times reporter James Risen's new book | Environment | The Guardian
Mohammad Mosaddeq and the 1953 Coup in Iran
New York Times Special Report: The C.I.A. in Iran
Electronic Briefing Book: The Secret CIA History of the Iran Coup