Taliban tribals are already up in arms, legs, torsos, and severed heads. What else are you expecting?
And the non-Taliban tribals are hiding like mice or already gone to jannat. So no arms and legs there.
This type of woosy attitude has already lead to so much death and destruction. If Afghanistan wants to remain like a respectable country, it must respect and get respect from neighbors for its borders.
One can't live in a house without boundary, where all kinds of donkeys bray and camels dump poop. One must have defined boundaries in order to have a house. Otherwise it is no house, just a poopie-place.
The terrorists only represent a small segment of Pashtun society... They have little support from the mainstream Pashtuns... To raise a nationalist issue like the border would include many more Pashtuns including the Millions that support secular parties like the ANP. Then you would have a real headache on your hands.