Thats the point I tried to get ^^,First of all, war is a terrible thing, I'm not denying that.
Imagine you're in there, your best childhood friend or even your brother gets killed by one crazy bastard. Your countrymen get slaughtered by the hundreds (over the years).
You HAVE to start growing hatred. And hatred will give you pleasure in taking revenge. That's a law of nature.
I don't think the video is THAT terrible though. That were like what, 20 people, around that? Guess what - there's three thousand more dying each month of starvation. Like that is not terrible, and yet, people have started to deny it, to ignore it, whatever.