No power has ever embarked in a war contrary to their interests. If the US were the first to do so, the only logical conclusion is that the leaders that were responsible are idiots. I do not think that is the case, though.
All that bs about democracy and the WMDs is just a coverup for something much simpler. A power that is protecting their interests (though perhaps not in a short term) by means of force. It's been that way since the dawn of time, and I don't see the trend changing. Force is the ultimate authority, and the ultimate constant in human affairs.
Was it right? Was it wrong? Was it moral? Was it legal?
I don't know, and quite frankly, I don't care. Those notions are relative and will change anyway. One must know to choose who their allies are, or suffer the consequences. Saddam's regime was not supported by his people at large and he lacked allies to ensure his control over his huge oil reserves. On top of that he mocked and denied international laws and authorities, but was quick to hide behind them when it was convenient. The world needs oil. It was just a matter of time before somebody went in and smacked him.
You don't like it? Too bad. I'd rather have a polar world than one without a clear hegemony. And I'd certainly have the US on top rather than China or the USSR.
Is that a selfish attitude, with taints of fascism? Perhaps. But I don't really care, because unlike most westerners these days, I don't have a guilt complex for living in a rich society while most of the world is poor. Nobody gave us for free what we have today. We have paid for every single thing we have with blood and sweat.
Despite all your bitterness, your historical illiteracy, your bigoted attitude, and your denial of reality, the bottom line is, the US win,
YU0 LOSE!