Ignorants, Iran and China are not allies, just friends with benefits who will abandon each other when things go south. China's not coming to Iran's rescue when Trump makes his move.
It's in our interest to dismantle Pakistan irrespective of its population growth. If the country is dismantled and nukes are removed, we will always get someone crazy enough to Gaza it out of existence someday. The problem is even if a single nuke gets through, it will cause more damage than what even a broken up Pakistan can do in a 1000 years fighting a low intensity fight while living a Taliban lifestyle. Advanced surveillance, resources scarcity, water wars, and infighting are plenty to keep them in check.