Prepare a list of similarities between Afghanistani and Pakistani Pashtuns. Give it a try. If you come up with four differences between 'lar o bar' Pakhtana , the 'Afghanistani' will come up with 14 or 140 similarities. If you try to use history to point out differences, they are also going to use history to point out similarities.
Tanoli, Swati and Parachgan are not Pashtuns. Kakars are also found in Afghanistan. Durrani have more to do with Afghanistan than Pakistan. You are failing from the get go.
Some of the tribes mentioned by you arrived in present-day KP because of the same nomadic life style you are ascribing to 'Afghanistanis'. In fact most of hill tribes of Pashtuns in present-day Pakistan had nomadic life style like Ghilzais not long ago. For example in 1867 Waziri tribes of Waziristan are described to have a life style like Pawandahs/Kuchis, moving to plains in winter and to hills in summer.
What do you mean by ' nothing to be proud of' ? . Are you saying that the settlements in blessed and sacred land of KP set apart them from 'Afghanistanis'?. Did Yousafzais grow two horns and a tail when settled in Peshawar valley?
The same ' wild' hill tribes of Waziristan had earlier gone to Afghanistan in 1929 to help Nadir Khan against Bacha-i-Saqao, playing the same mercenary role that they played later in Kashmir.
You are trying to come up with some sort of ' two nation theory', that Lar and Bar Pashtuns are different breeds with different histories. Thats not going to work because your Afghanistani opponents will give you a long list of similarities between lar o bar Pakhtana and will give you details of shared and common history. The only way an Afghanistani Pashtun might be turned off and give up on Lar Pashtuns, if you convince Pakistani Pashtuns to give up on their Pashto language and culture and adopt Punjabi language and culture. If you convince Pakistani Pashtuns to start wearing dhoti and marry Punjabis on such a mass scale that they become indistinguishable from Punjabis in looks and traits .............then Afghanistani Pashtuns will have no appetite for unity with their Punjabized population on other side of Durand.
@Sarah Ahmadzai