... and smash airplanes into buildings.
The point I was trying to make is that the author is trying to divert us from a more likely, albeit more subtle danger.
Any non-Continental group of immigrants, if not constantly infused with fresh blood will eventually be absorbed Borg-like into our culture - some longer than others but the generations are weaned away from the mother country.
No so with the Latin Americans, who have a land bridge (made 8-lane one-way by our politicians).