That is utter BS. If you stop negotiating in order to attack, then you are giving the enemy the advantage of knowing exactly when you will attack. This is one of the most incompetent takes I have ever heard - so much that I have to wonder if you are an Iranian agent

> Next country will not take US's negotiations seriously and will be, frankly, at some level justified in shooting first

Then they get levelled. Forgetting that America is a superpower is one way that Iran's negotiators, if they were engaging in good faith, fucked up on.