......the [Pakhtun] ethnic factor has always been a reaction to real and perceived discrimination by the pak state. ...
This is the same exact statement made by so-called Mohajirs.
Only people who can claim real neglect by the state are Balochis.
Rest of the ethnicities ARE THE STATE. Discrimination against Pakhtuns is a slogan mostly made popular by the socialists and pro-communists who were aligned with now-defunct afghan communists.
Their hogwash propaganda was a cover to oppose the pro-West policies of the pak-gov. Don't you even know some basic facts that Pashtuns enjoy big share in ministries and army, Urdu speaking have much bigger share in the trade and business, and Sindhis dominate politics.
Only Balochis have a marginal share in Pak institutions.