An excellent article in the Washington Post today includes written Question and Answer exchange with General David Petraeus after a recent re-visit to Iraq and the region.

General Petraeus: […] I think Iraq and the coalition forces are making considerable progress against the Islamic State. In fact, I would argue that the foremost threat to Iraq’s long-term stability and the broader regional equilibrium is not the Islamic State; rather, it is Shiite militias, many backed by — and some guided by — Iran.

These militia returned to the streets of Iraq in response to a fatwa by Shia leader Grand Ayatollah Sistani at a moment of extreme danger. And they prevented the Islamic State from continuing its offensive into Baghdad. Nonetheless, they have, in some cases, cleared not only Sunni extremists but also Sunni civilians and committed atrocities against them.

Thus, they have, to a degree, been both part of Iraq’s salvation but also the most serious threat to the all-important effort of once again getting the Sunni Arab population in Iraq to feel that it has a stake in the success of Iraq rather than a stake in its failure. Longer term, Iranian-backed Shia militia could emerge as the preeminent power in the country, one that is outside the control of the government and instead answerable to Tehran.

Beyond Iraq, I am also profoundly worried about the continuing meltdown of Syria, which is a geopolitical Chernobyl. Until it is capped, it is going to continue to spew radioactive instability and extremist ideology over the entire region.

Any strategy to stabilize the region thus needs to take into account the challenges in both Iraq and Syria. It is not sufficient to say that we’ll figure them out later.

[…] The current Iranian regime is not our ally in the Middle East. It is ultimately part of the problem, not the solution. The more the Iranians are seen to be dominating the region, the more it is going to inflame Sunni radicalism and fuel the rise of groups like the Islamic State. While the U.S. and Iran may have convergent interests in the defeat of Daesh, our interests generally diverge. The Iranian response to the open hand offered by the U.S. has not been encouraging.

Iranian power in the Middle East is thus a double problem. It is foremost problematic because it is deeply hostile to us and our friends. But it is also dangerous because, the more it is felt, the more it sets off reactions that are also harmful to our interests — Sunni radicalism and, if we aren’t careful, the prospect of nuclear proliferation as well. (read full article – well worth it)