Despite what you have conjured up in your mind, Iraq never requested our invasion. And you ignore that the half million to a million violent Iraqi deaths are above the number happening before our war with Iraq.
"Out of all the Iraqi casualty surveys so far, only the Lancet surveys and the Iraq Family Health Survey were peer-reviewed."
Lancet surveys of Iraq War casualties - Wikipedia, the free encyclopedia
You are also ignoring the Iraqis we killed in 1991:
"a research professor at Carnegie Mellon University, Daponte was a 29-year-old demographer at the Commerce Department in 1992, responsible for keeping track of developments in the Middle East, when she estimated that 158,000 Iraqis -- 86,194 men, 39,612 women and 32,195 children -- had perished in the war and its aftermath."
"In a subsequent 1993 study funded by Greenpeace, Daponte updated and publicly presented her analysis of the Gulf War, raising the total Iraqi death count to 205,000. She estimated that 56,000 Iraqi soldiers and 3,500 civilians were killed during the war, and that another 35,000 died as Saddam Hussein crushed Kurdish and Shiite rebellions that rose up after the United States stopped fighting. The largest number of deaths -- 111,000 -- Daponte attributed to "postwar adverse health effects."
Estimates of deaths in first war still in dispute