There were boundary disputes, tension and some border clashes. There was nothing that justified imposing 50 years of war on a neighboring country and ruining your own in the process.
Pakistan could have been a leader, a peacemaker, a big brother to Afghanistan but understanding that is beyond the limited intellect of GHQ, for whom every problem only has a shooting solution.
Until civilians are put in charge of Afghan policy, those who understand Pakistan's needs alongwith the Afghan landscape and mindset, there isn't going to be any improvement in the situation. These jahil jernails will just continue to create a bigger and bigger mess.
That is a rather "nothing important" dismissal.
Let me give you some more fresher memory unless you cannot see beyond your ethnic lenses regardless of the bumbling of GHQ:
Afghanistan was the
only country on Earth to vote against Pakistan's UN admission in 1947. Within three years, Kabul was funding armed lashkars crossing the Durand Line, sheltering Pakistani dissidents, orchestrating the Bajaur invasions of 1960 and 1961, and running Radio Kabul as a propaganda arm against Pakistan's territorial integrity and Afghan PM Daoud had Pakistani consulates physically stormed in 1955.
It's curious how those who accuse GHQ of viewing every problem through a single ideological lens sometimes apply a remarkably similar filter in the opposite direction where Afghan state conduct gets contextualized and humanized while Pakistani state conduct gets condemned in absolute terms.
A consistent standard of accountability would apply equally to both governments, regardless of where one's deeper
cultural sympathies happen to lie.
Now did Pakistan's military establishment take all of the above and respond with a series of decisions so strategically incoherent, so recklessly shortsighted, and so ultimately destructive to Pakistani society itself, that it vindicates almost every criticism leveled at them? Absolutely. No argument there. The blowback Pakistan lives with today is largely self-inflicted.
But, lets not brown nose the Afghans to where the complexion starts getting shades..