There was a time also when different groups in Pakistan were bitterly divided against each other, especially after '71. Over time, our differences melted away into a solid, unified identity, mostly a result of our shared experiences of suffering during the WoT and the need to unite against our foes.
Pakistan has the largest influence on Afghan Pukhtoons, Turkey also seems to be nudging the Uzbeks toward us, and if Iran will work with us on the Tajiks and Hazaras, we can make the most of it, in sha Allah.
25% of Pakistanis have Afghan origins.