Iran can be easily destroyed
The US already has a dozen plans for regime change in Iran.
A war with Iran won't be a conventional hot war.
Instead they'll be a sudden coup that takes control of strategic areas in Iran and declares a democratic revolution.
By the the time the regime gets its shit together; the US would've already released a ton of propaganda that shows the Iranian government shooting at the protesting crowd or worse.
It'll be a civil war with the US/ NATO intervening whenever it doesn't go well for the "opposition"
That way Iran can't go full retard and send missiles to US territories as they won't be in a direct war with the US.
I'm sure there are thousands of Iranian sleepers living and working in sensitive locations in Tehran for the past 10 years.
Plenty of ways to eat an elephant.