[MargaretR]

An Englishman's home is his castle BUT......beyond the moat --
some flexibility is needed by both existing residents and newcomers.
When this balance of concessions appears unequal, the drawbridge goes up and boiling oil gets thrown from the battlements.

It would be easier for all of us to be flexible if we adopted the North American native peoples attitude to land ownership, which is-

No-one owns any patch of earth at any time - we just borrow the use of the bit we stand on for the short time we are here.

As global warming and natural disasters make large parts of this planet uninhabitable, mass population migration will happen.

We will need to decide whether to lower or raise the drawbridge.
....and bear in mind that you may be on the wrong side of one