You quoted 2 questions and didn't answer either one.
So what? Name one country besides the US that does.
Shock and awe.
"As it is written, There is none righteous; no, not one:" -- (Romans 3:10)
It is not the responsibility of the US to wage war for the sake of justice and to stop the evil doers.
If the US ever did decide to wage a war for the sake of justice or to stop evil doers I as a US citizen would not complain about that if it was done well and without too much cost to US citizens. I had no problem with the US going after Al Qaeda in Afghanistan.
I don't think the USA is the most moral nation. Humans in general are not as moral, honest with themselves or as intelligent as some of us would like to believe we are.
My question is can the next generation be more moral, more intelligent and less self-deceiving than the previous generation was? I think the answer is yes we can get better. The Post-Hitler world has had a higher standard for justice than the pre-Hitler World did. Now we need a better excuse than race, religion or nationality before we collectively steal from each other or to pursue power for the sake of pursuing power.
The USA has so much power. The best I can say about the USA's foreign policy is that the USA probably has not abused that power as much as most other nations would have abused that power if they had the power.
The US pretends to wage war for noble reasons. As a US citizen I want US wars to either be noble or to be truly effective at serving the selfish interests of the majority of US citizens. The War in Iraq fails to satisfy me in either way.
I have read PNAC and have tried to guess what Rumsfeld and Wolfowitz were thinking. I think they were wrong. They may have helped the oil companies, Israel and the defense contractors but they have not made Americans safer or wealthier and they are not building some sort of long term containment of China.
So what? Name one country besides the US that does.
No country is running around the world fighting evil. The USA also is not running around the world fighting evil but the backers of this very expensive NeoCon foreign policy try to convince as many people as possible that the USA is fighting some epic Tolkien style battle with evil. This fake battle with evil is the cover story for a highly debatable foreign policy that is serving way too many masters to be effective at anything. The USA is just breeding new generations of enemies for itself.