Here we go again, only this time Iran is saying it. The message is: Iran will fight back with terror attacks if its nuclear program is attacked.
What Iran is missing in their analysis is that they will no longer exist. They will have nothing to strike back with, or for. What they will be counting on is expats getting angry and doing the suicide bombing thing on their behalf. And that may happen. But Iran will no longer exist. The land itself will be a wasteland.
And in the end, continued existence is the point.