Your language... is not very Christian.
Christian??? I want them all dead before they cross Rio, invade the US, and stick me with their medical and other bills.
Migrants always get more than they pay in taxes. This makes them parasites. Merit immigrants like me are assets. In this game, a few win, and the rest of us get shafted.
and then ask them if they want us to go extinct as a country.
Ban abortions and be selective in who you allow in.
how do you propose to keep up America's competitiveness?
America was able to compete when it had half the population it does now. Migrants and low-end immigrants make us less competitive since they remove the incentive to make robots.
Way back, 30% of Americans were farmers. Today, it's 3% because of the machines. My wife just bought three Roombas - one per floor - so we don't have to hire anyone to vacuum.
Unless you can come up with some way to get white Americans to start making large families again
So simple.
1. Bring factory jobs back from China and Mexico to keep well-paying jobs in.
2. Close the border to keep "cheap" labor out.
3. Ban abortions. See Poland.
These three moves would allow one person - typically the husband - to support the family of 4 or 5 on his own.
Working women are less likely to have 3 kids. Lucky if they manage to have one in their thirties.
BTW, the US, being as large as it is, does not need to be competitive. It can ban imports and not rely on exports at all. In this sense, the US is self-sustaining, save for rare metals.
A simple test: If North America was the only continent on Earth, would life be impossible and nobody would live here?
We don't trade with Saturn, Pluto, and other planets and somehow we manage...