Aliens Foreign and Domestic

A little Ford bearing on its bumper
A made-in-China South Vietnamese flag
Tailgated by a menacing larger Ford
Which passes, bearing on its bumper
A made-in-China Confederate flag
And then another Ford with an image of
Nuestra Senora de Guadalupe
On U.S. 96 near the Wal-Mart -
There must be something in all that
    But what?