The best way to explain it is that pa Dutch are very proud of being pa Dutch and they speak pa Dutch... Which is a bastardised version of German. I guess how it's similar to how Afrikaans are of Proper Dutch decent but consider themselves their own culture. I am from a very pa Dutch area, hometown is in fact named Hamburg. The people know they have German ancestors but consider themselves pa Dutch. I assume a similar thing happens in Louisiana. They created their own culture based off of their heritage that they connect to, not necessarily the identity of where their ancestors came from.