Quietly Quisling
You don't think all these foreigners invited here for cheap labor comprise an invasion? The invasions of the Dark Ages have repeated themselves in a different form. The Third World peons don't have to fight their way in, because the ambidextrous traitors who rule us make patriots go through all sorts of hoops in order to drive the privileged invaders out.
At its peak, the population of Rome was 1,000,000. During the Dark Ages, its population had been reduced to 20,000
"All Roads Lead to Rome"