Melt Their Cold, Cold Heart, Please!

I showed a documentary on the Rwandan genocide to my class.
There was a scene where i thought was fabulous to bring out the issues of moral courage, media ethics and discrimination and where i thought would surely evoke and stir up some emotions in the kids.
Imagine this:
A horde of Tutsis had been hiding from the murderous Hutus. Upon seeing a group of foreign soldiers, they thronged forth, thinking that salvation finally arrived. Yet, the foreign soldiers ignored their pleas for help, rationalising that they were under instructions to just escort the expatriates safely out of Rwanda. Sensing that the soldiers would not help, they turned to the media, who were there to tail the foreign soldiers' mission. The Tutsis pulled out all stops while they were in front of the camera, making monkey faces, ridiculous antics and all, hoping that could change their seemingly inevitable fate. It was an all-out, last-ditch desperate bid to save their own lives. The media, with their irrepressible urge to perform their role, simply shot the scene and left.
Then, gun-shots were heard.
The inevitable happened.
It was a very emotional scene that showed the cruelty of life, the ugliness of humans and the unimaginable affront one could possibly commit against other fellow human beings, ordinary men and women who, too, had families, who, too, could feel pain, happiness and sadness.
I paused at that scene and asked my kids what they felt. They said they felt nothing. I prodded them for more. No answers were forthcoming.
I was aghast and disturbed. I shouldn't be the only one who thought insurmountable injustice had been lashed out.
An hour into the show, they thought it was simply boring, because it was not "action-packed", with what you know.
I felt so sad for my students. Are they already dead men walking even before they step into the working world, stripped of emotions and feelings?
Education must have failed them.