What is your concern here? Are you as concerned that there are no-go zones in France and Sweden now? What about Crimea? Taiwan?
If the tide of modern times is toward seeing people live in their historic land, and one of the best documented (by virtue of the truth of Biblical records) is that the Philistines lived in Canaan before Israel, then you need to be spending your time battling the view that people must have their historic lands intact.
Then you might want to ask yourself if that is a 'religion' topic or even a Christian one. I don't see where it is either, and hope you enjoy the power of the new covenant and its mission, because it can never be bogged down in property rights issues.