Look people are just people and you get all types in this world. Yeh there’s probably overseas Pakistanis who look down on native Pakistanis and then there are native Pakistanis who look down on overseas Pakistanis. My only interaction with native Pakistanis has been sons/daughters of rich landlords from random villages in Punjab and Sindh who came to the West to study and then looked down on me for not drinking or actually working hard in life. I’m not going to assume everyone’s like that in Pakistan but realistically if I wasn’t so open then sure based on my limited experience I would make the deduction that native well off Pakistani’s look down on overseas Pakistanis for a myriad of reasons. I have no experience to counteract that assumption. So to a large extent all assumptions or judgements are based on people’s experiences and their own mindsets. Sometimes they’re being narrow minded and sometimes they just don’t know any better or haven’t had the right exposure.
Some people just need any excuse to feel superior, it can be nationality, religion, the car you own, its just human nature to an extent. As long as a majority of people aren’t like that all you can do with such minorities is ignore them.