Which organization is the responsible of Pakistan attack ?

The killings of those 100+ students were committed by the Pakistan Taliban which consists of many factions/groups. Unlike Isis where they have no boundary, members have the same cause and are very united towards that cause; the Pakistan Taliban consists of groups of terrorist who tend to rival each other. Some of these groups tend to reflect the tribal regions in the areas, also some groups have global ambitions (like taking down western nations) others have local ambitions (making sure woman are not allowed to go outside w/out permission). In recent months there have been very many deadly fights between the factions of the Pakistani Taliban. Where one leader of some groups publicly swears allegiance to Isis but other leaders from other groups condones that allegiance. In 2007 the Tehrik-i-Taliban Pakistan (TTP) was created officially. Though the roots of its formation dates back to 2002. The TTP is one of the many factions that make up the Taliban, but was is so different about the TTP is that their sole targets are the Pakistanis, especially military members, their families, associates, etc. This group is a consequence of Pakistan military attacking inside tribal areas bordering Afghanistan, after the US war in Afghanistan began,after the attack on 9/11. Some foreign militants were fleeing from the war in Afghanistan into the tribal regions in Pakistan (FATA). This is an indigenous response to that. The TTP were initially just trying to kick the Pakistani military out of that region but have since, over the years, expanded to out side the tribal areas (the school was located just outside the tribal region).

The TTP sent out a statement saying that their sole purpose was to kill these children, they had no intentions to keep them alive. They have done similar attacks in the past. What we call soft targets. They are cowards and I truly hope they rot in hell.

Pakistani Taliban

on the news, they say its the pakistani taliban, who are supposedly NOT associated with the afghani taliban.

One of them religions..