SO? what else is new? Your analysis of the sunni/shiite thing is a bit shallow
NOt really, because it wasn't a "Sunni/Shi'ite" thing. Most of the soldiers who fought for Iraq were Shi'ites, but they were also Arabs and Iraqis. Saddam saw Iran's weakened position as an opportunity to grab territory, as Iran was an international pariah at that point.
Most of the world, especially the US went along with that, because that would never come back to bite us in the ass. These were the same geniuses who thought a strapping young man named Osama Bin Laden who wanted a scholarship to kill Russians in Afghanistan was a good bet.
So once more, it's our old police of "Sticking our dicks in a beehive and complaining about getting stung".