Some Key Incidents that we should think about different perspectives.
In Iran and Iraq war, America backed Iraq and did nothing even while Iraq uses a chemical weapon against Iran because this war was in its favor
America later attacks Iraq even though Saddam Hussein has destroyed chemical weapons plant, just because this peace was not in its favor.
America supply weapon to the Taliban and Bin Laden to fight against Russian soldiers.
Later when Bin Laden starts to speak against America for establishing an American base camp in Saudi Arabia America declares him a terrorist.
America supply weapon and Saudi Arabia supply money to group to overthrow Syria's President Bashar Assad who was a good friend to Russia. Which later known as ISIS.
Later America declare the same ISIS as a terrorist;
and in the name of destroying ISIS, it enters in Syria war and fought along with Kurds force.Actually it was Russia and Kurds force who really fought against ISIS. America just left their so-called allies Kurd force in the middle. And decided to move out its troop from Syria.
America wants to destroy the close ties between Turkey and Russia. So while French and Germany were against leaving Syria America decided to move out just to make turkey president
happy, because Kurds were in favor of the separate state for them while Turkey's president was against it. ( perhaps it's all scripted drama between America, France, and German, who knows)America goes war with Iraq because it doesn't let America to implant oil industry in its land and same goes to Iran.at the same time both leader Saddam Husen and Solemani challenges the president of America and its allies Israel and at the same time, Solemani had established Quds force to reunite middle east through the grip of USA.
The nuclear weapon I think it just a pretend. Cause Iran was in the nuclear deal with P5 countries after 2015 so there was no worry. a country that lifted Trump to go against Iran perhaps is Saudi and Israel.