We ordained for the Children of Israel that if any one slew a person - unless it be for murder or for spreading mischief in the land - it would be as if he slew the whole people: and if any one saved a life, it would be as if he saved the life of the whole people. Then although there came to them Our messengers with clear signs, yet, even after that, many of them continued to commit excesses in the land. Those who wage war against Allah and His prophet, kill the believers and plunder their property shall be disgraced in this world, and for them is a dreadful doom in the hereafter. (5:32-33)
When innocent children are slain, it is indeed as if the whole of mankind are slain. And those who perpetrated, those who planned, those who approved, those who conceived, and those who attempt to justify acts of harabah by invoking the Qur'an are hypocrites, and will indeed face a dreadful doom in the hereafter.