See what happened and still happens in former Zaire. American diplomacy is not always pragmatic, but when it is it is not necessarily moral. You can argue it is at times more moral than others, or that sometimes it is genuinely moral, but you can't make it a rule. Therefore it is the right system, therefore it should be adopted by every single country, and since your country defends capitalism, then your country has a moral foreign policy. This analysis ignores the diversity of the world, the history of capitalism and the reasons why it has flourished in Europe, as well its possible flaws.
Nothing is that simple.
It will also allow me to reply to your previous post about the US morality in international affairs. You said the US is dedicated to exporting democracy and capitalism, therefore its foreign policy is good. I guess you must have the ideal foreign policy since it can at the same time defend your country's interests AND be moral. First, I don't see how a country's self interests could coincide so well with the common good of the global community. It would assume they are all after the same thing, or that, as you've implied, the US is the ultimate model.