You are only speculating, and doing so in a way that supports your agenda. You have no idea how a war with Iran would have been fought on a conventional battlefield and global state-supported terrorist attacks on levels never seen. You are arm chair generaling with the comfort of omitting pertinent data that only a fool with omit.The hostages would have been killed and a horrible war that included Israel would have occurred.
Any war would have been short-lived, and the ruling mullahs, including Khomenei, killed.
The world would not have been dealing with this nonsense for the last 37 years.