Not sure if this is someone illustrating Poe's law, but there are enough people who genuinely hold this mistaken opinion that it's worth addressing.
Iraq wasn't invaded because there were gaps in the inspection regime (there were) or because Iraq was resistant to a more aggressive inspection regime (it was). Iraq wasn't invaded because of a criminal indictment of Saddam Hussein for the instigation of the Iran-Iraq war. Iraq wasn't invaded because of some 20 year old, probably inert gas shells buried, rusting, and forgotten in a ditch somewhere. Iraq was invaded to remove chemical, biological, and potentially nuclear weapons which constituted a grave and immediate threat to the security of the United States.
This justification was, of course, a complete fabrication. It was an utterly fantastic construction based on the stacking of all the worst case, low probability assessments generated by the US intelligence apparatus in order to stampede the public to war (and a highly successful general election).
We went back in to Iraq in 2003. After nearly 20 years of trying to get Iraq to fulfill it's obligations which it AGREED to after the first Iraq war.
The US wasn't trying to enforce sanctions on Iraq in 1983. At that time, they were selling them weapons.