You hear people (on both “sides”) say all the time “it's about oil, dummy”. Now, while oil does play a significant role, it's much larger than that. It's about money and power. Let me draw your attention to some events “bigger” than Iraq. After all, Iraq is, when it comes down to it, a pip-squeak nation that America should be able to roll over in a couple weeks, although shockingly Iraq seems to be holding it's own (more, more).
Russia, as most of you know (since it's been used to slander their motivations, perhaps rightly so), has massive commercial contracts with Iraq (more). Literally hundreds of billions of dollars are tied up there, and since money is already invested, it can't afford to have that jeopardized. The US recently demanded that Russia expel Iraqi diplomats and informed them that all contracts were null and void and after the “liberation” would be handed to US corporations. (more)
So, to simplify, Russia perceives this as America waging war to steal billions or even trillions of dollars from Russia. China feels the same way and has lodged similar protests with the UN as Russia (more) — in total there are $1.1 trillion in contracts with Russia, China, and the EU, again, all of which will shift over to US corporations after the war potentially. (more)
As I mentioned earlier today, America has started flying U-2 spy missions along the Russian border (more) and earlier today Russia scrambled a pair of fighter jets to force the American plane out of Russian airspace (more).
Now Russia has “pseudo-troops” (it's unclear whether they're a privately contracted Russian firm or whether they're sanctioned) fighting along side the Iraqis, providing assistance in blocking US electronics and so on. (more) Additionally, the recent killing of a Russian reporter by US troops in Basra will not be good for public opinion in Russia (more).
America may be big, but do you really think the world will be a better place if military confrontations continue between it and China and Russia? Iraq is a defenseless little baby country on the whole — Russia and China really do have enough firepower (more than America) to effectively destroy the US. Do you want that? Do you want to push the world into a place where that could happen?
This isn't about overthrowing an evil dictator and bringing freedom to his “hostages”. I'm not going to tell you that there isn't an evil dictator, since obviously there are at least two of them involved, if not many more. What I am going to tell you is that if you investigate any of the “facts” being brought up to the mainstream, you'll see that they're but a shallow excuse designed to empower fat megacorporations that don't give a damn about the people of this planet.
We're just food to them.
PS. Since I hear Americans are being told the absolutely ludicrous story that there are Iraqi troops (more) in Texas preparing to launch chemical strikes let me remind you quickly of two things before you go pop your brown-skinned neighbors: (a) The “most likely suspect” in the anthrax attacks after 9/11 was someone inside the US military (more), and (b) “Operation Northwoods” whereby the US military would gain support for war on Cuba by launching terrorist strikes on US cities and blaming someone else (more).