Rumor
I disagree. While myself and most Americans have zero appetite for war with the Persian nation (I'd rather enjoy some good Koobideh and smoke shisha), what Israelis have now that they didn't in 2010 are important to note.
The multi-layered missle defense has them feeling much more confident. But the big one is their new found Arab friends. Speculation that KSA would allow use of their airfields, which would be a substantial gain over a decade ago.
Before flaming me, realize I am not saying that their calculations would be correct or successful. Or that Iran wouldn't already have contingencies in place to neutralize any percieved or actual advantages gained.
Cheers
The American people had no appetite for the Iraq war, or world wars 1 and 2. It's the government and the lobby groups.
And who controls the media calls the shots.