The government's foreign policy most certainly does not represent the core values of most americans. I would say less than 25% of american are real Warhawks like Dixie or Toby. People who want to just bomb anything and everything in sight. Now, it's true the the goverment can lie to the people, or stir up fear and paranoia, and get a temporary 60% approval rating for invading iraq. But, that number is based on smoke and mirrors. Lies, to be more specific in the case of iraq. The core values of most ameircans do not lie in a war like foreign policy.
Empirical evidence supports me. In poll, after poll, americans overwhelmingly support multilateralism, international institutions like the UN, and using diplomacy over force. Just think if ALL these americans were actually voting?
As I said it doesn't have to be a majority it only has to be enough. The fact that even a significant bloc of voters support such things is disturbing.
Also let us not forget. The US is not a homogenous nation but a cobbled patchwork of regional cultures. If these kinds of attitudes are prevalent in one area they poison the wells of others.