Is there any or proof of it? Afghanistan ie the west of the curent Durnad line today Mya have had Afghans but east of the current Durand line was there ever a record for Pakhtuns/Afghans living there.
The Afghan empire did stretch much further easst into India but did any historian mention Pakhtuns/Afghans living in the area known as NWFP pre-Islam?
As for as I know as Mahmud of Ghazni moved forward he defeated Hindu RAJA’S.
The Dilazaks have lived in that area known as NWFP longer than most of the Pakhtun tribes and the Dilazaks have never been accepted as pashtuns.
Pashtuns move eastward with the the spread of Islam.
Hindko has always been considered the NATIVE language of the Peshawar valley.