The Sun has told Argentine in no uncertain terms that the Falkland Islands are self governing under the UK crown, and wish to remain that way. If they wish to drop the relationship with the UK they are free to vote to do so.
They are not a UK colony. The irony is that Argentina wishes to make them an Argentine colony against their will. They tried to do just that by unwelcome force not so long ago and lost the war they started.
What part of self determination does Argentina not understand? It is very last century to pursue territorial claims against those who do not welcome your advances.