WATCH: U.S., Iran May Collaborate Secretly on ISIS, Analyst Says

Gary Ackerman of START adds that Arab states must play a key rhetorical role in the anti-Islamic State coalition to prevent it from looking like a Judeo-Christian attack on Islam; Israel, on the other hand, should definitely not join.

While the United States will not accept Iran into its coalition against the Islamic State group, also known as ISIS, the two countries are likely to collaborate secretly in certain instances.

That according to Dr. Gary Ackerman, director of the Special Projects Division at START, the largest terrorism research center in the world.

In an interview with Aimee Amiga for Haaretz.com, Ackerman described the role Arab states should play in the coalition, saying that even lending their support to the American initiative would serve a crucial role: preventing it from looking like a Judeo-Christian attack on Islam. He added that Israel definitely should not formally join the coalition.

Ackerman explained why Saudi Arabia – which is said to have financed terrorist organizations, including Islamic State – is now pledging to support the U.S.-led coalition.

He also spoke about how unlikely it is that the United States will send ground troops into Iraq and Syria to battle the militants. The Obama administration will do everything it can to prevent putting its own boots on the ground, he said, even if it means sending in those of its allies.

Click here for Part One of this interview, "Obama's fight against ISIS is a gamble, but one the U.S. is willing to take."

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