You can't rub any salt on Pakistani wounds because Pakistan has never accepted that territory as their by heart. Bangladesh was, is and remain insignificant to Pakistan. Nobody in Pakistan cares if Bangladesh progress or gets destroyed. For most Pakistanis Bangladesh is just a country like Somalia is or Madagascar is. You are the ones making noises even after almost 50 years of your independence, just to keep yourself relevant to Pakistan.
What I appreciate about Bangladesh is that the politicians are honest, it is not the case with Pakistan. Pakistan have the most corrupted politicians in the entire universe. Pakistani politicians have properties and illegal money in Dubai, Riyadh, Sharjah, Abudhabi, Switzerland, London, New York, etc. They just come to power for making money for these 5 years and then leave the country for next 1 or 2 decades. Currently look at the on going issue of Ishaq Dar Pakistan's finance minister, who came to power along with Sharif govt and after looting and destroying economy he have left the country, he did the same thing in 1992. NAB is trying to issue warrants through interpol this time. The point being, you don' have such corrupt politicians in Bangladesh.