larry johnson is correct with the exception that our mucking about in iran began in 1905 when winston churchill in his role as the chief of the british navy stole iran's oil for his navy's switch from coal to oil; 

During a Zoom meeting today I listened to a retired US General make the case for going to war against Iran… He was not advocating that Trump do so, but he provided a fascinating summary of how he, and most Americans, view Iran as a threat that must be destroyed. His basic charge is that Iran has killed thousands of Americans, especially US military personnel, and is an irredeemable terrorist state. Stay tuned… I’m going to show you how wrong that gentleman is.

When he finished talking, I asked for the floor and stated that Iran’s attacks on US personnel over the last 45 years were largely in response to US actions. What follows is a full explanation of my disagreement with his premise. I gave him the Reader’s Digest version… Here is the Full Monty.

Iran’s anger with the US begins in 1953, when the democratically elected President, Mohammad Mossadegh, was ousted from office in a CIA- and MI6-backed coup on 19 August 1953. The event is commonly referred to in Iran as the “28 Mordad” coup, after the corresponding date in the Iranian calendar.

Jump ahead to 1979, when the Iranian Revolution toppled the US-backed Shah Mohammad Reza Pahlavi, usheried in the Islamic Republic under Ayatollah Ruhollah Khomeini. The revolution stemmed from deep-seated grievances against Shah Mohammad Reza Pahlavi, who had ruled since 1941 as an autocratic monarch closely aligned with the West, particularly the United States and Britain. The Islamic Revolution was fueled by a variety of factors:.......more..........