I think many Pashtun tribes are victims of political wrangling and battle. The Afghan nationals seem to have control of the process of deciding who is more or less pashtun. For example you will notice that often the Burkis and Niazis are often considered non pashtun even though they are more or less pashtun and counted among pashtuns by most philosophers and historians like the jadoon and tareen people.
I believe the problem with these tribes is only the fact they are inclusive and have taken heavy part in the Pakistan army andother institutions. This is something those Afghan nationals cannot swallow and hence with their monopoly of "pashtunness" declare them non pashtun. Any tribe that is known to be extremely patriotic is condemned in this way. What is happening is that the more Pakistani a people are, the less they are treated as pashtuns and more as "sell outs" as some burger khor afghans would refer to me.
Lol yaar. This debate was of an anthropological and historical sense. No need to bring politics into it. And as far as Afghan nationals are concerned, they consider even Margalla Hills to be a part of Greater Afghanistan, despite the region not having any Pashtun descended tribe. And that is when they are not claiming Mianwali and Attock.