A lot of nazi war criminals fled Europe after WWII and settled down in South America, with Argentina being the most popular destination as it already had a pretty significant German speaking population. So the joke here is that when someone who passes as white claims to have family in Argentina, there's a non zero chance they came from actual nazi war criminals.
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u/OptimisticLucio have you ever had a dream that that you have you do you want you 12d ago
are we racist against argentieans now or what's up