To begin with, Iraq during the final years of Saddam Hussein's rule was no more of a threat to Israel than it was to the United States.
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More fundamentally, there are far more powerful interests that have a stake in what happens in the Persian Gulf region than does AIPAC, such as the oil companies, the arms industry, and other special interests whose lobbying influence and campaign contributions far surpass that of the much-vaunted “Zionist lobby” and its allied donors to Congressional races.
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To argue that support for Israel and/or pressure by supporters of Israel was a crucial variable in prompting the U.S. invasion and occupation of Iraq assumes that the U.S. invasion and occupation of Iraq has been good for Israel .
Evidence suggests strongly to the contrary, however. As cited above, in the years leading up to the March 2003 U.S. invasion, Iraq was no longer a strategic threat to Israel nor was it actively involved in anti-Israeli terrorism. In short, Israel had little to worry about Iraq during Saddam Hussein's final years in power. They do now, however.
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Using Israel as an excuse for unpopular U.S. policies in the Middle East is nothing new, either. Over the past decade, I have had the opportunity to meet with a half dozen Arab foreign ministers and deputy foreign ministers and have asked each of them why their government was still so friendly with the United States, given U.S. policy toward the Palestinians, the Iraqis, and other Arabs. Every one has answered to the effect that U.S. officials had explained to them that the anti-Arab bias in U.S. foreign policy was not the fault of the U.S. government itself, but was the result of wealthy Jews who essentially ran U.S. foreign policy.
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Indeed, that has largely been the functional purpose of anti-Semitism throughout Western history: to misdirect popular opposition to economic injustice, disastrous military campaigns, or other failures by political and economic elites onto a convenient and expendable target. It is critical, therefore, for people to resist—particularly those who identify with the peace movement—buying into this myth that it was Israel and its supporters who were responsible for the U.S. invasion and occupation of Iraq.