I think the biggest mistake made so far was the assassination of Ayatollah Khomenei --- who was a moderate, not a hardliner and held the role of Supreme Leader since 1989 – he was actually deeply loved despite other problems with Guardian Council

Even one GOP senator ahs tried to walk back that the US didn’t target him

We don’t know whether it was a US or Israel missile that killed Khomenei, his step son and step daughter and his young granddaughter

I think the US and Israel lost this war after this assassination because they don’t understand Shia Islam…

CLIPS 

https://www.youtube.com/watch?v=8BrdTcyZ2xw - Chris Hedges The Suicidal Folly of a War with Iran

(2) Scott Ritter: Iran's Missiles OBLITERATE Tel Aviv, Khamenei's Death BACKFIRES on Trump - YouTube