So as to refrain from denouncing someone who has just passed away while his family is in mourning, let's figure, given all the information we have, that John McCain, rest his soul, was probably to his misfortune a very mentally challenged guy, who like so many others, was taken advantage of by the elite of the genocidal Financial-Military-Industrial-Complex and its criminal CIA-controlled media, and used to falsely justify and at times participate in, America's murderous taking of many millions of innocent lives of men, women and children, as Martin Luther King said, in atrocity wars and covert violence on three continents since 1945 in order to maintain unjust predatory investments.  John McCain's sorry story began with a young navy pilot's receiving and obeying illegal criminal orders to bomb the Vietnamese cities of Hanoi and Haiphong. We can imagine young McCain just might have not been conversant with the new and stronger international laws first used to prosecute the Nazis after the Second World War. However, ignorance of the law has never been an excuse for murder.
Principle I of the Nuremberg Principles of International Law
Any person who commits an act which constitutes a crime under international law is responsible therefor and liable to punishment.
The fact that a person acted pursuant to order of his Government or of a superior does not relieve him from responsibility under international law, provided a moral choice was in fact possible to him. This principle could be paraphrased as follows: "It is not an acceptable excuse to say 'I was just following my superior's orders'".
U.S. Nuremberg Trials Prosecutor Would Have Proudly Prosecuted McCain As a War Criminal, History News Network, George Washington U., 10/19/2008 https://historynewsnetwork.org/article/55841
A chief U.S. prosecutor at the Nuremberg trials after World War Two, told CBS Editor Richter that he strongly supported the idea of trying the U.S. pilots captured in North Vietnam as war criminals. U.S. Navy Lieut. Commander John McCain, who was captured a year later, would have been among the group Taylor wanted to prosecute, and by the courts decision, military personnel cannot claim that they were simply following orders.
Robert Richter, an Emmy-winning documentary filmmaker, and political director for CBS News from 1965 to 1968 wrote in Bomber Pilot McCain: War Heroism or War Crimes? published by Institute for Public Accuracy, October 15, 2008:
"I will never forget how stunned I was when Gen. Telford Taylor, a chief U.S. prosecutor at the Nuremberg trials after World War Two, told me that he strongly supported the idea of trying the U.S. pilots captured in North Vietnam as war criminals -- and that he would be proud to lead in their prosecution."