Britain was justified in forcibly expelling inhabitants of the Indian Ocean island it controls because without property rights, what do we have. Any owner of property, whether a house, lot or island, must have the right to control that land, and that means controlling the people that inhabit it. Britain was completely within its rights.
Expelling the native population of an island is not justifiable. The upheaval causes to these people by forcefully evicting them from their native land in order to build an American base should not have been sanctioned. These people were mistreated, threatened, and starved in order to force them to leave. They were moved to foreign lands where they were not welcome. This was a misuse of power.
It is strange to say that someone who arrives late to a party is somehow qualified to make all decisions about how the future of that party is conducted. People should never be expelled from their homes, and Britain had no right to do so to the inhabitants of the Indian Ocean island it controlled.
Britain has been known to abuse their power over the lands it has colonized. They are known to be more interested in what they can gain from the labor and the land than caring for or about the people that live in the lands they control. People who inhabit lands have the right to continue to do so.