Bourbon,
If it is me, then I wasn't nearly clear enough... I suppose either way I don't see any single group wanting a seperate nation of Pashtun-stan. My impression is that the huddled masses of Pashtun's on either side of the border are pretty ambivalent. In the FATA, they are already considered an autonomous zone, on the AFG side they are not nearly as postured to do what the Kurds did in the Northern Zone. Insurgents don't benefit from a Pahstun-stan - because the ambiguity of the current situation far better suits their needs. Neither the Pak nor Afg gov'ts want to jetison the areas.

So.... All around I don't see any group that when pressed would support the idea of Pashtun-stan.

Live well and row