I answered your question. Since the legal title to the land was dubious in the first place, this brings up several issues which have been subsequently glossed over. If the islanders want British administration, then they can have it. But sovereignty belongs to Argentina. When the maps are drawn up, they should be called "Malvinas/Falklands" with the flag of the Sun of May prominent. The same way sovereignty would still belong to the UK should any third party decide to occupy and populate a sparsely inhabited or uninhabited adjacent British island. Military conquest doesn't establish legality. Israeli settlements were built on mostly unused Palestinian communal farming land. Does that make the settlements legitimate and therefore the settlers entitled to a vote? Of course none of the Spanish/Argentines from the removal are still alive. That wasn't a serious question. It doesn't change the fact that they were forcibly evicted by a country which had abandoned the same islands and renounced her sovereignty several times over before unilaterally deciding she wanted them again.
Colonialism is indeed a loaded word, designed to draw the reader to a desired conclusion. There are different lengths to which it was applied. The British, Spanish, French, Dutch, Portuguese, and later the Germans and Belgians are all guilty of it. The Napoleonic Wars put an end to most of Spain's colonial ambitions, and her former colonies rose up in revolt. It was within this vacuum that the unique nature of the Malvinas dispute comes into play. Since they had no native population, the rights to the Malvinas came with which country actually settled the country. We can talk all day about the indigenous population of the Americas if we want, but it only amounts to a boiling pot of psuedo-logic designed to distract from the real issue. The French settled Isla Soledad, sold their rights to the Spanish, and was ruled out of the Viceroyalty of the Rio de la Plata. Argentina next took control over the Malvinas after a short gap, and it was only after the residents were forcibly removed by the Americans and finally by the Royal Navy in 1833 that this control ceased. Two wrongs don't make a right. There was no reason other than control of strategic islands and implantation of a new colony that we have this situation today. That is why I dub it colonialism at its worst. There was simply no excuse for it, and it was a blatant act of dispossession.
I realise that the prevailing opinion is that it's just a 'rock' as Diest put it. Then let's apply this principle to its greatest extent. Find the most forlorn 'rock' that you own, and give it to us. But I'd much rather have the 'rock' that is actually ours. Nuestra Malvinas.
Forums are made for discussion. It's not easy for some to hear a contrary viewpoint. I hear them all the time here about the Malvinas. Some are reasoned arguments, while others are lacking for quality and substance, while playing around with facts. It amuses me to no end about how many British intellectuals, journalists, historians, and public figures share much of the same feelings as I have about the Malvinas. To add to that chorus, we have a steady retinue of 'neutrals' such as Obama, Clinton, Scty. General Ban Yi Moon, and Vladimir Putin, who espouse the same argument that the much maligned Cristina Fernandez is taking to the court of world opinion. There's a legitimate dispute regarding the islands. Let's talk. Unfortunately, according to Simon Jenkins' opinion piece in the Guardian, 3000 people hold an effective veto over British foreign policy.