Why are you surprised? PPP has not done any remarkable work in interior Sindh, still people reluctant to go to other parties. None of the other political leaders including Imran Khan or Ganja Sharif have clear cut policies for rural Sindh. All have betrayed Sindhis in past. Unfortunately how little has done by PPP, people of interior Sindh have no other choice.
These nationalists and other ethnic parties are creation of ISI, hence people of Sindh is rightly deciding who to give vote.