S America is littered with old-timey German-style settlements - Colonia Tovar and so on (usually high enough up in the mountains to brew some decent beer and imagine yourself back in ol' Bavaria), and areas which are farmed almost exclusively by uber-whites of German stock ... but not all of them have much or anything to do with fleeing Nazis. (There are lots of people who have extremely 'backward' or downright weird theological ideas like the Mennonites of the Chaco and areas of Mexico, "Colonia Dignidad" in Chile etc, but that's not totally the same thing.) Some of these places are conservative to the nth degree and yes some of them sheltered Nazis, but the German 'heritage' in S America goes back way way way beyond WWII.
It was the same in the US - lots of people don't realise that what they think of as 'cornfed middle American' looks are in fact mostly German. iirc there was a point in the late 1800s when it was a real question whether the USA would end up English or German-speaking, the plains had been settled by so many penniless hardworking German farmers who hadn't yet assimilated enough for the anglos to feel comfortable.
