Did someone actually put him up for a peace prize?
Anyway, no I don't think any president has the right to arbitrarily wage war on anybody they want to, and this is not what I meant. Iraq is a supporter of terrorism, remember the (I believe it was) $20,000 prize families of suicide bombers got, that alone, to me, is reason for removal (especially when coupled with Sadam's generally bad rule) as it flys in direct conflict with our international objectives, specifically Israel. (Yes I know you don't think this realy affects them but I do, and there are other things like the terrorist camps in the north (which killed prominent Kurds, i.e. Sadam's enemies) ect...)
Can you name one thing that has gotten the Arab world more pissed at us than Israel (honestly the war with Iraq has not, yet at least). The simple matter is that we will not have security until the Palestinians have a state, and we will not allow Israel to be concord (although technically this would probably lower hostilities

), and Israel will not give them there state so long as they are blowing themselves up, and they will not stop blowing them selves up until outside forces stop funding them,
Iraq was one such outside force, as is Syria (whom we have been threatening), Iran (whom we are probably plotting to overthrough), and Saudi Arabia (whom we are no longer dependent on for oil:))
So to wrap it up
Sadam,
~brutal ruler who invades countries I like and tortures people - makes me want him removed (though it does not give me a good reason on it's own)
~suports terrorism - gives me a good reason to remove him, in addition to furthering my desire to have him removed
~has outstanding charges of illegal weapons production - gives me a legal reason to do it, as well as a real potential threat to me and my allies, and another good reason to have him removed
in any case I will be quite pissed if we can't find them, this will not change my believe that what we did was the right thing, but I will be quite pissed, at Bush, for doing such an incompetent job at finding the weapons or for having used that for the pretext for the war when he could not garentee we would be able to prove our allegations