In 2017 we were near to that possibility.
And do you how was American twisted plans to trigger war?
First in 2017 June, Tehran terrorist attacks with "foreign assistance".
Then start July, Hezbollah disclosed the existence of a rocket factory and an American aircraft carrier visited Haifa port (first time in 17 years).
Israel threatened to attack the factory, but finally nothing happened.
Do you know how it works? They can't do the provocation directly to Syria/Lebanon because it will be unanswered (like all Israeli bombings of Syrian weapons shipments).
They first attack Tehran, and a few weeks later seek a excuse for Iran puppets (Syria/Lebanon).
That way is how real Iran power works and USA knows it, but you dont.
What's certain is that you're way off about Iran, other informed users have told you as much while I proceeded to demonstrate it repeatedly by pointing out factually incorrect statements.
The enemy will not need to resort to such twisted stratagems aimed at indirectly provoking an Iranian respons. If they take the decision to ignite war against Iran then they will go right ahead and attack, if need be they'll orchestrate a false flag to concoct a mock justification. It's not as if they didn't have a colorful history of pulling off such false flags. Their total control over the mainstream media landscape enables them to do so. The reason they haven't resorted to downright military aggression is nothing else but Iranian deterrence power i.e. Iran's ability to inflict intolerable cost on the aggressor.
Also you're contradicting yourself right here, because when it comes to attacks by zio-American terrorist proxies in the city Tehran there have been several of those before 2017, in the early 1980's dozens upon dozens actually, and neither of these ever elicited the all-out military response from Iran you're claiming they would.
Such convoluted, far-fetched theories aren't going to make the narrative you're rehashing any more credible. A simple study of Iran's basic ground realities will reveal how detached from reality it is. The sole fact that the country's highest authority, the Supreme Leader of the Islamic Revolution isn't originally from Tehran at all but rather an Azari-speaker from 750 km to the northeast is sufficient to illustrate the fact that the Islamic Republic does not pay any attention whatsoever to so-called "ethnicity", a very relative concept in the Iranian context anyway since the majority of Iranians have direct ancestors from not one but several of these communities.