The concept of WAR summarizes into act of violence, vengeance, ruthless acts of deepest human morality and words to same effect. This has been the case throughout the human history, and has been practiced by almost all the belligerents of war. Both the aggressors and suffers find themselves into situations where both act out of proportion befitting a civilized society.
It seems new to us being an inhuman acts, but it has been there since time immemorial. Its only the media advancements in quantum leaps that we have come across this kind of exposure, while sitting in our living rooms.
Having said that, it doesn’t means that what they did was justified. They still need to be taken to justice. At least some plus can be gained due to this advancement of media.