Saddam said he was planning to restart WMD after the sanctions were lifted and the heat was off. A few other reasons:
http://www.breitbart.com/national-security/2015/05/19/5-reasons-the-iraq-war-was-not-a-mistake/
http://www.nationalreview.com/article/277115/saddam-what-we-now-know-jim-lacey
http://www.nationalreview.com/article/343870/why-did-we-invade-iraq-victor-davis-hanson
What a joke. Let you and your family go attack CHINA!! Why don’t you go bomb the Russians!! “ Planning to restart” Give me a darn break.That is absurd.