Bush cites a massacre from the 80's, not a current massacre.
"Iraqi refugees tell us how forced confessions are obtained: by torturing children while their parents are made to watch. International human rights groups have catalogued other methods used in the torture chambers of Iraq: electric shock, burning with hot irons, dripping acid on the skin, mutilation with electric drills, cutting out tongues, and rape."
Ongoing torture, but of how many? Bush doesn't say. Many, many countries use torture, including our allies in the region, I'll bet. But Bush did not allege mass murder here.
As to preventing ongoing massacres, Bush would have a better case invading the Congo.
If this is not evil, then evil has no meaning."
Agree, but greater evil operates in the Congo.
But for stopping an enemy with the proven will and ability to acquire WMD, hence threatening the US, invading Iraq seems reasonable to me.