Its because Afghans are taught from birth that Loy Afghanistan is a prophecy that will come in their lifetime and the only people that are in their way are Punjabis, Tajiks, Hazaras, Gul Khans, and other Pakistanis. In that "prophecy" Pakistan will fall and Peshawar will be part of Afghanistan.
Pakistanis are not taught to hate. Afghans at dinner time are told stories of killing each other.
Pashtuns from Pakistan are always taught since day 1 about their Pashtunwali and most importantly GHAIRAT. My older brother and father told me ever since I was little if someone disrespected you or your family it is your DUTY as a PASHTUN to fight for your ghairat.
Baloch are also taught to stand up for themselves.
Rest of Pakistanis are just sitting their like ducks, dude got his head smashed with a chair and he didn't do ANYTHING.
Is it gonna take a pregnant women or child or elderly person to DIE to get some flame in the PAKISTANI SOUL????