Another one, according to Zibakalam, is that Israel is serious about its words. Because Israel fears that Iran may get nuclear weapons and arm its regional allies, including Hamas and Hezbollah.

"Because of this consideration, some analysts say that Israel is serious. And with or without the United States, if Israel thinks that Iran has reached the point where it can soon acquire a nuclear weapon, it may attack Iran," he said.

"I believe Israel is genuine, Israel is feeling threatened by Iran," he added.

Zibakalam argued that, however, if some progress can be made on Iran's nuclear issue during the next round of nuclear talks, then Israel will have less excuses for attacking Iran.

"If there are progress during the nuclear talks, ...then it would be very difficult for Israel to convince the world that Iran is a threat," he said.

Zibakalam said if Israel finally does launch attack on Iran's nuclear facilities, the U.S. will be dragged into war, and Iran will definitely retaliate by attacking Israel and the U.S. military bases in the regional countries and there is a risk that all the region will be plunged into war.

"So, the U.S. and Israel can start the war, but they cannot finish it," he concluded.

In January, EU decided to put an oil embargo on Iran, which comes into effect in July. Zibakalam said that due to its heavy dependence on oil revenue, if Tehran takes no action, the western sanctions on Iran's lifeline oil exports will affect the country's economy badly.