Yeah, that happens when you kick out the existing argentinian/spanish settlement (I don’t remember if it was before/after independence) and bring your own British settlers, as I explained before.
Idk what European descent has to do with anything. Many Argentinians are of European descent.
Nah. For most of human history there were not referendums to “let them choose”. They just annexed the place.
The referendums is a relatively modern “invention”.