The Tehran Times version of that speech is also worth reading, if only for the changed emphasis in some areas
Israel will be demolished if it attacks Iran: IRGC chief - Tehran Times
The italics are mine
"The commander of the Islamic Revolution Guards Corps has said that
if Israel attacks Iran, IRGC missiles will leave nowhere intact in Israel and nothing will remain of the country.
Major General Mohammad Ali Jafari made the remarks during a press conference in Tehran on Sunday.
He also stated that Iran would reconsider its nuclear commitments if international organizations cannot prevent Israel from carrying out its military threats against the Islamic Republic.
“Iran’s nuclear capability is at an acceptable level, and such actions cannot deal a serious blow to it. But if international organizations cannot prevent the Zionist regime from taking such an action, Iran will reconsider its commitments in this regard, and the situation will change,” Jafari said in response to a question by an Associated Press correspondent about the possibility of Israel launching a strike on Iran’s nuclear facilities.
“But it does not mean that we will move toward developing nuclear weapons,” he added.
He also said, “The Zionist regime sees its existence in danger, and in view of its criminal nature and the fact that it is in the habit of killing, of course it tries to resolve its problems through taking military action and issuing threats. But
it is a remote possibility that the Zionist regime would take such an action without the permission of the United States because it is aware that in that case it would achieve nothing.”
The United States will not support an Israeli military action against Iran because its forces and bases in the vicinity of Iran are within range of IRGC missiles and Muslims in the region and the rest of the world support the Islamic Republic, he stated.
Elsewhere in his remarks, Jafari said that the IRGC has no military presence in Syria, but added that a number of IRGC personnel are in the crisis-hit country providing non-military assistance.
“Since the establishment of the (IRGC) Qods Force, the force has been pursuing the goal of supporting oppressed nations, particularly Muslim (nations). A number of Qods personnel are also present in Syria, but that does not mean that we have a military presence in the country,” he said.
He went on to say that the IRGC is providing financial and advisory assistance to Syria, since it is a link in the chain of resistance.
On the Islamic Republic’s response to a military attack against Syria, the IRGC commander said that it would depend on the situation.
“We cannot say now with certainty that Iran will support Syria militarily if it comes under a military attack, and it completely depends on the situation,” he explained. "
I'd almost take those parts I've italicised as being conciliatory in nature - its as if they're saying they are not anticipating an attack