In the First Gulf War 1991 the west kicked Saddam out of Kuwait but didn't follow him to Baghdad, they halted the war and left him sitting pretty.
He might still be there if he'd kept his trap shut, but instead he kept promoting Islamic terrorism, eg-
"Does America realize the meaning of every Iraqi becoming a missile that can cross to countries and cities?" -Saddam Hussein, September 29, 1994
"Oh sons of Arabs and the Arab Gulf, rebel against the foreigner...Take revenge for your dignity, holy places, security, interests and exalted values." -Saddam Hussein, January 5, 1999
So he was signing his own death warrant, and when it was suspected he had WMD's that was the final straw, so we had to do the Second Gulf War in 2003 to go to Baghdad to shut him up.
And of course no WMD's were found because he'd had plenty of time to bury them out in the desert, or else they were a few flasks of deadly nerve agent capable of wiping out cities which he kept under his bed but the Allies forgot to look there..
Below: US troops after capturing Baghdad International Airport in 2003-
God said- "I have summoned my warriors to carry out my wrath...they come from faraway lands...to destroy the whole country...and destroy the sinners within it" (Bible:Isaiah ch 13)