There is absolutely no challenge to what the army does or has done in the past and this too is a natural corollary of the genesis of this state
Nations are products of long historical and evolutionary processes; most present nation states evolved thus. But when states are formed on an artificial basis of contrived nationhood or on the basis of religion, as was the case with Pakistan, Israel and Yugoslavia, they of necessity turn into fascist states, dominated by a militarist ideology. Serb-dominated Yugoslavia denied rights to other nationalities and eventually imploded. Pakistan by claiming to be the legatee of the glory of Islam burdened itself with heavy historical baggage, but then it could not have done otherwise as it was that claim that it wanted to justify its artificial existence with. Consequently, Pakistani rulers in keeping with its elite’s interests curtailed national rights of different nationalities, and forced them to rally under the banner of religion and to accept its ideology by upholding their brand of Pakistani nationalism.
The Baloch, Bengalis, Sindhis and to a certain extent, the Pashtuns resented and resisted this imposition in varying degrees. The Bengalis having had the advantage of distance and a sympathetic neighbour went their separate way in 1971, while the Baloch after an initial period of freedom have borne the brunt of military operations because of their refusal to accept the artificially imposed ideology of a Muslim nation and have so far thwarted the attempts to crush their determination for a separate entity status. The Sindhis, at first taken in by state-sponsored ideology, gradually realised that their interests did not coincide and have resisted it though erratically at best since.