Extremely unlikley to utterly impossibile. Americans wouldn't shoot to kill in the same situation, they had better equipment, doctrine and assessment capabilities.
(plus, they weren't pissed over continuous hit-and-run poking at their airspace by adversary aircraft).
Whoever was dumb enough to mistake a propeller plane for a jet is court martialed, the USA apologizes profusely, not much happensOkay, say the Aeroflot jet flies straight towards Okinawa for that reason. American pilots mistake it for a nuclear-armed Tu-95 bomber and shoot it down. It spirals into the Tsushima Strait, killing nearly everyone on board. What next?
USS Vincennes, anybody?
A mistake in the Middle East is the most realistic chance for an American error.
What some are leaving out is the mindset of those in decision vis a vis Soviet/Western counterparts.
The Soviets were paranoid and suspect not to mention being quick to fire first and ask questions later. This attitude was born out of decades worth of authoritarian rule.
In the West it's a complete 180 from the Soviet/Warsaw Pact mentality.