Dude you are American, you don't know but there is like day and night difference between Afghanis and Pakistanis. Pakistan in last 70 years have developed their own culture, mindset, identity in which afghanis are only there to create divisions. They still have not gotten over hangover of ancient times and claim our lands based on some centuries old empire which didn't even last 15 years, think about that for a moment. They call it abdali empire.
Obviously for average american difference isn't much between different brown muslim people, how racist of you.
Said this I'm willing to give those born in Pakistan till certain year nationality if they never went back and studied in Pakistan and can pass test of Pakistaniat. As these people will feel alien in Afghanistan, trust me. But only after there is full control on border between both countries. And only to certain afghanis, not everyone.
USA richest country on planet, one of largest, can accommodate 400 million more people and still maintain better lifestyle then vast majority of the world. Yet they are not willing to take single refugee.
This will not go through CCI, senate, parliament etc its just wishful thinking from Imran Khan. He also once wanted to open offices for taliban, he's like that. Very tribal mindset despite being PM of country, you can't do much about it. There has been huge increase in street crimes in Karachi, CM Sindh told him its because of afghanis. He obviously was quick to justify their crimes and put the blame on Pakistan state for not giving them nationalities.