Well, I think the question is pretty self-explanatory. I would particularly like to hear from the Americans out there. Let's see if we can rouse some patriotic spirits!
First, I'd like to give a few facts that have given me cause for concern:
1) During the bombing of Afghanistan, and later during the fall of Baghdad, US troops opened fire on various neutral international buildings. Examples were a Red Cross field hospital (with a big red cross on its roof), the offices of Al-Jazeera news channel (in both Kabul and Baghdad - the news station had given US forces the co-ordinates of its Baghdad offices to prevent such an occurrence), and a hotel housing hundreds of reporters from around the world.
In each case, the building attacked posed no threat to US forces, and in the last case, a tank was filmed opening fire on the building by a camera crew. In a press conference, a US military spokesman said that the tank that opened fire had come under fire from gunfire coming from the hotel. All of the reporters present had denied this, and the hotel was a well-known location, and the US authorities were well aware of its use.
The US government had tried to put pressure on Qatar to shut down the station before the invasion, but had failed in doing so. The Al-Jazeera news programmes were very anti-American. Was this a serious attempt to shut the news channel up? I think so.
2) American forces have been involved in warfare, both openly and covertly, on every continent on the planet except Antarctica since the end of WW2. In Vietnam the US military used chemical weapons, and in Japan the government authorised the use of nuclear weapons, even though the Japanese regime was on the verge of collapse. The US has threatened to use nuclear arms several times since then, mainly in South America, and also in China (during the Korean war).
The United States has sponsored an invasion of Cuba, actually invaded Grenada and Panama, attacked neutral Cambodia during Vietnam, and trained Islamic insurgents during the Soviet invasion of Afghanistan - insurgents that came back to bite America in the arse in 2001.
The US sold arms to both Iran and Iraq during the Iran-Iraq war, and has sponsored numerous dictatorships around the world, including the vicious General Pinochet, and the Saudi royal family.
The US has sponsored unjust wars, and been involved in unjust wars many times since the end of the Second World War. On a number of occasions the Geneva Convention has been broken (recently most notably at Guantanamo Bay).
3) You think the US went into Iraq the first time to restore democracy and peace? Guess again: the US immediately restored the autocratic Kuwaiti royal family to the throne. The CIA has toppled a number of democratically elected governments in its time, and supported numerous dictatorships.
4) Since the end of the Cold War, the US has actually increased military spending, to over 36% of world military spending (up from about 30%).
The United States still holds half of all nuclear arms in the world, and has several thousand missiles aimed at Russia and China (each) at all times. Why would the country that had won the Cold War want to increase military spending? The mind boggles.
I won't continue for now, this post is plenty long enough as it is. I think it's pretty clear what my opinions are. What are yours people?