See this article below Not oil but Israel:
That goes against what I regard as the fundamental reason for the war: the war was led by neoconservatives and fought in the interests of Israel, at least as Likudniks envision Israel's interests. It is all well-documented, though the neocons imply that Israeli interests coincide with those of the United States. But as I point out in my article on the subject — and this fact is on the public record, too — the original idea for the war was conceived in Israel. Moreover, the war achieved the goal hoped for by the Likudniks — destabilization of the Middle East.