What is the central idea of "Geraldo No Last Name" by Sandra Cisneros?

The central idea of "Geraldo No Last Name" has to do with
the harsh anonymity of immigrants in this country.  In the vignette, the other character
Marin is quite upset when Geraldo is killed, but she cannot understand why she is so
upset because she did not really know Geraldo.  She only knows his first name, which is
the first marker of Geraldo's anonymity.  She believes that he works in a restaurant,
yet at the end of the vignette, the narrator suggests that Geraldo worked in a string of
kitchenettes to make enough money to send home to his family.  The anonymity of the
immigrant experience is highlighted at the end of the vignette when Geraldo's experience
is linked to that of others--in the end, his family knows that he left for a better
life, not knowing the hard fate that has befallen him.