"I've never seen any such proof."
Then you've never bothered looking.
Try
http://www.moreorless.au.com/killers/hussein.htm -- a site I found in seconds via google.
Saddam Hussein - page 1
AKA 'Great Uncle', AKA 'Lion of Babylon', AKA 'Lion of Iraq', AKA 'Beast of Baghdad'. Saddam translates to 'One Who Confronts'.
Country: Iraq.
Kill tally: Approaching two million, including between 150,000 and 340,000 Iraqis and between 450,000 and 730,000 Iranians killed during the Iran-Iraq War. An estimated 1,000 Kuwaiti nationals killed following the Iraqi invasion of Kuwait. No conclusive figures for the number of Iraqis killed during the Gulf War, with estimates varying from as few as 1,500 to as many as 200,000. Over 100,000 Kurds killed or "disappeared". No reliable figures for the number of Iraqi dissidents and Shi'ite Muslims killed during Hussein's reign, though estimates put the figure between 60,000 and 100,000. (Mass graves discovered following the US occupation of Iraq in 2003 suggest that the total combined figure for Kurds, Shi'ites and dissidents killed could be as high as 300,000). Approximately 500,000 Iraqi children dead because of international trade sanctions introduced following the Gulf War.
....
But go ahead, bury your head in the sand, call for Fortress America, whine away. The reality is 911. An unbelieviable attack on innocent civilians by islamofascisti funded by scum like OBL and Sodamn Insane. You are part of a tiny fringe group of deniers. Do tell, what do you think of the Protocols of the Elders of Zion, or the numbers killed in Nazi Germany? How tight is your tin-foil beanie?
Kill tally: Approaching two million, including between 150,000 and 340,000 Iraqis and between 450,000 and 730,000 Iranians killed during the Iran-Iraq War. An estimated 1,000 Kuwaiti nationals killed following the Iraqi invasion of Kuwait. No conclusive figures for the number of Iraqis killed during the Gulf War, with estimates varying from as few as 1,500 to as many as 200,000. Over 100,000 Kurds killed or "disappeared". No reliable figures for the number of Iraqi dissidents and Shi'ite Muslims killed during Hussein's reign, though estimates put the figure between 60,000 and 100,000. (Mass graves discovered following the US occupation of Iraq in 2003 suggest that the total combined figure for Kurds, Shi'ites and dissidents killed could be as high as 300,000). Approximately 500,000 Iraqi children dead because of international trade sanctions introduced following the Gulf War.
I can't believe you would try to use a source like this to prove the existence of WMDs. First of all, please note that there is not one single reference to weapons whether chemical, nuclear or otherwise. Secondly, please notice that this same source blames the US-led embargo for MORE deaths than Saddam Hussein. So if you're going to accept this source for one figure, you have to accept it for the other.