I think a few things that make one a pakistani are:
When someone asks about your origins… u dont have to think twice before replying that you are a Pakistani. Hence, you dont really have to explain how ur not really born there but ur parents blah,blah etc. You consider urself a pakistani, hence you are one.
You know exactly what to yell back, when someone yells PAKISTAN!.. your first instinct is to say “ZINDABAD!” eventhough it may or may not be true.