Are these costumes racist?

After some complaints from groups such as the United Farm Workers, Target and Toys R Us have stopped selling this “illegal alien” costume.
The United Farm Workers’ Web site says:
The extra terrestrial creature perpetuates racism and
discrimination in an already hostile environment and during a
period of time when the debate on immigration reform is
increasingly hateful and divisive.
Apparently Amazon doesn’t see a problem with it; you can buy the costume — if you want to take your chances on getting popped in the face — for $68.95. (Walgreens is offering the same one for $39.99.) But that’s not all. Amazon is also selling a “Sexy Border Patrol costume” …
and this illegal alien mask …
and this “Mexican costume” …
and this “Hey Amigo costume.”

Is this all just hyper-sensitive political correctness rum amok? Or are these truly offensive? Cast your vote now.