true, but each successive geberation is less likelyto marry someone living in theri ancesteral homeland. The case of japanese americans is an example of that.
Sindsagar, pak-one is in minority though. it is also not just about links or feelings for a land, but also identity, which includes language, culture..music, literature, poetry etc etc. Lets just say for the most part that goes away with each generation.
747s have been around for a few decades now. the three generation impact is there. you can be a third generation ..if someone moved to US in the 60’s, and I do think they had planes then 
and had a kid in 1964, that kid would be second generation american, lets say this has a kid in 1989, that kid would be a freshman in college with all opportunities to go to pakistan with you know planes and all.
in the end the points I made about change occuring, its not my own hypothesis, although it is fairly easy to observe.
the rate of this change varies by community and obviously by family and by person, but it is a reality.
Italian example defintely hold water, soemone running away from the law is little to do with how Italian they are compared to Italians in italy… majority of them dont have italian citizenship anyways, cant speak the language. Italian american culture and identity is not quite the same as Italian culture and identity.