There have been several quotes from Iranian officials who have said they will not stand by and wait for a first strike from Israel. This is one of those situations where if you're going to talk about it publicly, you better be prepared in case some Iranian official decides not to wait and see if your serious or not.
Yeah, that's what I was thinking. "Sure, let Israel absorb the pre-emptive strike..."
Coming from the vice president, who has been known to make the rounds in that region when war is imminent, I don't think we can underestimate the gravity of that statement.
One nuke in Tel Aviv would be the end of the state of Israel.