So it’s safe to go to Derry then? Unionists have been moved out?The simple answer is that the land belongs to the people who live in it.
Indigenous people should resist colonisation at the time, if they don't like the implications of losing ownership of their land.
There's no point complaining about it later.
In the case of Derry, although it has built by the planters, it has been colonised in modern times by nationalists. Anyone who knows the place will be aware that the remaining planters now live in outlying rural areas, or have retreated to rough housing estates on the outskirts such as the aptly named New Buildings.
Colonisation cuts both ways.