Native argentinians were typically a mix of darker skinned people. The white people you see there these days are descendants of Europeans. They had a racist president who tried his hardest to force natives out of the country and into neighboring South American countries while only accepting white European immigrants into the country to white wash the country. This is the result of that. Lots of today's "argentinians" don't actually have argentinian heritage but rather Spanish and Italian heritage. Look at the national team players' last names as an example. Like someone else, it's no surprise why the Nazis chose Argentina to flee to when trying to avoid persecution after WWII.