A human who's body does not exterminate foreign lifeforms that go where not permitted, dies. The same is true of a nation. A difficult truth that all nations must come to terms with: all of the foreign peoples who will not integrate, must be excised for our nations to survive. Access to our lands must be controlled. Most nations that are not the west understand this truth well. The west is suicidal, and so it commits suicide by immigration. Any nation unwilling to stand by and wait while those not given entry starve to death with their children, and gun them down if they ignore that law, is doomed.