Some time ago I watched a documentary series on Dutch public television, created to memorize the Armenian genocide of 1915. It was made by a Turkish-Dutch (or the other way around) investigative journalist and an Armenian-Dutch musical star, so they were both personally involved. The journalist kept saying that the Turkish aren't bad people (neither are the Germans, or the Americans), so it could not have been genocide. But in the end there was no denying.
As Morgenthau's story was available on iBooks for free, or almost free, I started reading it in a dull moment and I found out it was quite well written (turns out by a ghost writer), though sometimes terribly racist, so I kept on reading it. Not what I expected from a 100 year old book expressing the views of a bureaucrat.
Interesting are the descriptions of the main players in this extremely sad episode in Turkish (or even European imperial) history. Morgenthau had frequent access to all of them, the Sultan, all ambassadors, and the actual powerbrokers, Enver and Talaat pasha, of the Committee of Union and Progress. This was a small group of democrats who staged a coup against the Sultan, took over power and quickly turned into a dictatorial oligarchy.
The first part of the book is not about the Armenian genocide, but about how imperial Germany persuaded the dictatorship to join it in the WW I, and explains, or argues, that WW I was not an accident, but something imperial Germany wanted in order to consolidate and expand its colonial power by creating direct access to the Persian Gulf (through Serbia, Bulgaria, Turkey and Iraq), think of the Berlin-Baghdad railway, and to its colonies in East-Africa. I don't know how attacking Belgium and France fitted into this, but Morgenthau's part of the story makes sense.
The second part then describes how the Turkish dictatorship, after the English gave up the Dardanelles Gallipoli campaign, felt victorious and safe enough to deport and kill all its non Muslim inhabitants. And so they did. According to Morgenthau the details are too ugly to publish.
Morgenthau has documented this as best he could, tried to convince the pashas to stop - also appealing to the Germans who were more or less in charge in Turkey during WW I - and left when he realised there was nothing he could do. In this part the book gets racist, describing the cruelty of the Turk and rubbish like that (Christians are good, Muslims are bad).
It is interesting to read, though, that the Turkish dicatorship has no interest or understanding for the humanitarian efforts by the US and its inhabitants. Specifically not for the fact that they were humanitarian, and not self interested.
I know that the US have caused a lot of violence, injustice and whatever in the world (Vietnam, Afghanistan, the Cold War), in the meantime exploiting the powerless all over the place. At the same time, not everything is driven by self interest. US policy is also based on notions of humanity, cooperation, the right to pursue happiness and all the good stuff that came with the declaration of independence. That seems to be missing in Chinese, Russian, Saudi Arabian or Iranian foreign policy. Let's not forget that.