There is a lot of focus on the ‘evils’ of immigration… When large numbers of peoples ‘less civil’ Murder, rape, and steal. Yet that is not the only ‘threat’ a native population might face from ‘immigration’.
When a people with greater work ethics colonise your country… watch out! they will out perform you. And your children will end up working for their children.

This explains a lot about what happened when the British showed up here in NZ. It was not via oppression and racism that they took over… but because of their work ethics and other superior values that caused them to prosper…

Migrants who are prepared to sweat and toil, and live frugally … will Conquer all… not via evil… but because of their superior virtues… They grind harder.. they are more thrifty… they out entrepreneur your children…. whose fault is that?
You forget the price of Freedom and prosperity?
You got soft. You got apathetic. You forgot the ethics of your Christian pioneering heritage.
You deserve to wane.
Had you raised your children to be worthy… there would be no such threat.