So in one of the most brutal and important wars of the late 20th century Iran and Iraq fought for 8 years. The war OTL had the Iraqis do well the first few years, then stalemate then the Iranians turned the tide and by 1988 the Iraqis were in a stronger position.
What if by 1988 the Iranians had decisively won the war, driven Saddam Hussein from power and spread the Islamist revolution to Iraq?
How would the US, Israel, and the other western powers, as well as the Soviet Union and gulf states react to this?
What would the geopolitical consequences be of a decisive Iranian victory?