As long as the Bush Administration is actively working to bring about the downfall of Iran's system of government, they have every incentive on Earth to want the United States tied down with endless blood letting inside Iraq. I would do a little research on how the U.S. is attempting to destabalize Iran and point to the absolute hypocricy of Bush complaining about any Iranian activities in their own neighborhood while the United States is interfering inside Iran, threatening attacks on Iran while Iran does nothing to directly threaten the U.S., all the while with 160,000 U.S. troops stationed by Iran's border inside Iraq with a couple of fleets sitting off shore.
You can read this piece I wrote for evidence on how Bush never wanted peace with Iran:
Peace Averted; George Bush vs. Iran
http://www.aleftturnforclark.com/2007/05/peace_averted_george_bush_vs_i.html#moreOr amazingly enough, check out the information in this usually very dependably right wing source about U.S. efforts to destabalize Iran:
With Friends Like These (MEK, Iran & USA)
FOREIGN POLICY Via einnews.com ^ | By Erik Sass | September 2005
Posted on 10/01/2005 4:56:56 PM PDT by F14 Pilot
An Iranian group has killed American civilians, allied itself with Saddam Hussein, and holds a spot on the State Department’s terrorist watch list. So why might it become America’s newest friend in the Middle East? Hint: Tehran.
In August 2002, intelligence reports revealed secret nuclear facilities in the Iranian cities of Natanz and Arak. The revelation left officials in Tehran speechless, in large part because the evidence was not gathered by the United States or any of its allies. Rather, the courier of such sensitive intelligence was the Mujahedin e-Khalq (MEK), a decades-old Iranian dissident group. In most cases, dissident groups who could work so effectively within rogue states would be natural friends with Washington. But in the case of the MEK, it’s more complicated: The U.S. State Department lists the MEK as a terrorist organization....
...That presence on the ground, and its clear opposition to Iran, is winning the MEK support in Washington. President Bush recently called the MEK a “dissident group,” a clear hat tip, and several U.S. legislators want the MEK removed from the terrorist list, which would allow it to raise money in the United States. MEK fundraisers have challenged the group’s terrorist status in court, so far without success. The Iran Freedom Support Act, a House bill clearly intended to help the group, was introduced in April by longtime MEK backer Rep. Ileana Ros-Lehtinen. It remains tied up in committee. MEK supporters on Capitol Hill are likely waiting on the State Department’s official revocation (or reaffirmation) of the group’s terrorist status, expected to take place in early October."
http://www.freerepublic.com/focus/f-news/1495002/postsI don't have all of my research on this handy right now, but Bush signed a version of that legislation into law.