IS the war unpopular? Let's get serious.
Your question doesn't specify whether you mean that you feel the war is unpopular domestically, abroad, or both. Let me take these one at a time.
Worldwide:
The rest of the world knows that America will attack eventually, regardless of world opinion. Since anyone who supports America in this endeavor will expose themselves to terrorist attacks such as those of the World Trade Center, the Pentagon, the USS Cole & many American embassies, foreign countries have nothing to gain from supporting America & everything to lose. Therefore, they'll publicly condemn the war and pretend to be neutral until America wins. After that, I expect that our "allies" will pretend that they supported us all along.
Domestically:
Bear in mind that opposing Bush has been popular for quite some time because of the way that he was elected. Also bear in mind an ugly truth about Americans: we're not serious people.
Think about this: people complain often in America about the high price of gas, high auto insurance rates, high mechanics' bills, parking shortages, air pollution from exhaust, and traffic jams. But if someone suggests public transportation, bicycling, or walking (instead of driving), they're treated as if they were crazy. There are many ads on TV talking about how drug $ supports terrorism--and it does. However, no one talks about the countries we buy our oil from--most of which are Middle Eastern countries that are supportive of many terrorist groups against the United States. How much of the $ to fill the gas tanks is ending up in terrorists' hands?
The war is just one of the many things Americans aren't serious about.
We pay extra welfare $ for promiscuity.
We pay millions of $ for the department of homeland security--you remember them, the guys who recommend securing your house with duct tape?
We go to McDonald's by the millions for our food, and then sue them for making us fat.
We let homeless people urinate in front of office buildings & live in public parks, and call them crazy--while we avoid those same parks, paid for with taxes from working people.
We elect congressmen who used to be lawyers (whom we don't trust) to write our laws, and pay them with taxes which they get to set.
We know politicians from our two major parties lie to us, and represent the lobbies at the expense of the voters--yet we donate millions to them every year and won't elect independent candidates, or candidates from other parties.
Finally, we believe everything we read on the Internet and everything we see on reality TV, but we won't read the newspaper, watch the news or keep informed about anything. Something might think we're intelligent, and that we think we're better than they are.
No, we're not serious people. We complain about our problems in this country, sure, but actually do something about them? Not our responsibility.
Hussein hates us. He calls America the Great Satan. Iraq has stockpiled anthrax, nerve gas and other weapons for the last 12 years. Hussein likes al Qaeda, because they hate America. The UN passes resolution after resolution telling him to stop, but he won't. That's a problem.
American troops can stop him from killing people, and helping terrorists kill people. Everybody knows America can stop him--America, the UN, even Iraq. What nobody wants to hear is how--w/weapons, and that means *gasp* war. Nobody wants to hear that there will be war w/Iraq someday whether America attacks or not. Everybody wants peace w/Iraq--except Hussein. Hussein wants time to build on Irag's arsenal of weapons of mass destruction.
Everybody knows what will happen if America attacks. Iraq will lose. What no one knows is what will happen if America DOESN'T attack, and Hussein continues his strategy. I, for one, don't want to know what Hussein will do left to his own devices. Iraq doesn't have the protests we have, because they're *gasp again* ILLEGAL in Iraq!
No, the war's not really all that unpopular--except to Hussein and the terrorists. The Americans protesting the war over here aren't protesting an unpopular war; they're protesting to be popular--it's more socially accepted, not to mention easier, than being informed.