what does it mean when, in the middle of a discussion or debate, someone mentions the fact that they are a 6th generation nz'er? why would they even need to mention that fact?
i can only think of one explanation: that they think this somehow makes them a better nz'er than me. that this history means that their opinion somehow has greater weight than my opinion, simply because neither myself nor my parents were born in nz. maybe that this person thinks they somehow have (or should have) more rights than me.
there is only one context where time spent in nz might be relevant in a debate - perhaps in discussing aspects of nz culture that a new migrant may not be aware of. in that situation, a person who has lived here longer would have a better knowledge of local traditions and history. but even then, where their parents or grandparents were born would have no bearing on that.
and anyway, as someone who has lived in the country for 38 years, i think that length of time would be about long enough for me to understand local issues pretty well. so why would someone bring up their family history in that way, unless they meant it as a racist slapdown?
if anyone can think of a better explanation, believe me, i'm all ears!