The situation was quite different in 1991. Iraq had invaded another country which then asked for help. An international coalition led by the U.S. waged a war to push Iraq back within its borders. The congress passed (by 1 vote) what was essentially a declaration of war (in concert with the U.N.). The President was experienced in war and did not even "appear" to have a questionable agenda.
There are some who say that the bombing of the bunker full of women and children (by mistake) was the real motivation for the long term effort to finally bring down the World Trade Center Towers (an earlier attempt failed but they did not give up). If we bomb Iraq again, do you really believe that terrorism will stop? Would you give up if someone bombed and killed your people? Bombing is a short term fix and not really a solution at all. Power corrupts and absolute power corrupts absolutely - we are as close to absolute power as any country has been in history. We better be really careful because we are going down a path that can lead to destruction. The only solution is real leadership and we do not have that now.