Many years ago (before 2001) I saw a documentary on television about the Taliban in Afghanistan and their barbaric treatment of ordinary people including women and children. There was a scene in it so utterly horrific that it will stay in my mind for the rest of my life.
This week's atrocity at Peshawar has shown the world that there are no limits to what the Taliban will do. To them, the concept of basic human rights such as the right to life and the right to be educated is meaningless. To them, the sword is mightier than the pen.
Those who have committed the atrocity have not taken heed of the Quran 4 v 93 "If a man kills a believer intentionally, his recompense is Hell, to abide therein (For ever): And the wrath and the curse of Allah are upon him, and a dreadful penalty is prepared for him."