I think it has more to do with her personal hatred of Pak. There have been other political parties that have come and gone...which came into power without the whole Pak hating narrative...and that was in the past...when 1971 was fresher in ppl's memories. Im pretty sure she can win on the platform of "solving domestic problems"...ppl would care more about eliminating poverty, having more jobs, more development, etc. She even has some progress to show for it. But she has stuck to her usual Pak hating rhetoric...which again is her personal vendetta.