In the Constitution of the United States are these words "We hold these truths to be self-evident, that all men are created equal, that they are endowed by their Creator with certain unalienable Rights..."
Morally, it seems that the US, as a people, claim the rights granted by the Constitution are rights due to all men.
Why then, do we selectively apply these rights to only US citizens? Are the citizens of other countries of a lesser status that they do not deserve due process? Is that why it's okay to summarily judge and execute someone in another country when we suspect them of terrorism? Why can we legally do something(execute without due process, invade privacy, etc...) to a person in another country, that is illegal for their own country to do to them?
Legally, of course, the Constitution can only be applied to those under its legal protection.
But why is the rest of the world treated like second-class human beings by the US Government?
The US Government should be bound by the constraints of the Constitution when dealing with any human being, not just a US Citizen.