PBS has a series on WWI, called “The Great War.” One of the historians of the program has this to say about the Armenian Genocide: 

“The presence in the northeast of the country of a thriving cultured and relatively wealthy community of Armenians was a difficulty to Turks long before the First World War.

“It became a political and strategic threat when the war broke out because of the place of Armenians in the Russian Empire. However, most Armenians, two million of them living in the Turkish Empire, were no threat whatsoever.

“In many ways, it shows that the old idea that war is politics by other means is outdated in the 20th century. War is hatred by other means. And in this case, hatred means extermination. The First World War was the biggest war ever to date. The Second World War was bigger still. It’s not accident on my mind that both of them were marked by genocide. This is the logic of the brutalization of total war.”