The tension over pocho/non-pocho can trace back to Mexican history and La Malinche who was a traitor to the indigenous Aztecs and birthed the first mestizo - hence the Mexican insult Hijo de La Chingada. Mexican philosopher Octavio Paz wrote extensively on this theme.
There is a website called pocho.com that's dedicated to aserbic Chicano humor.
This is absurdly ironic because the natives of Meso-America did not speak Spanish. In fact Spanish was a language forced onto them.
Read about what Las Casas witnessed to get an idea of why the natives of America speak Spanish today. Rape, forced labor, and betrayal by the Aztec Malinche.
Chiborn should come to Spain and see how the Spanish really feel about Spanish speaking Amerindians.
Chiborn in Spain: HOLA! mi hermano espanol! Yo ODIO pochos!
Spaniard: Callate tu sudaca. Volver a mexico subhumano.
Person of Latin American descent (esp. Mexican) inept in his usage of Spanish. By extension, any of such people that reneges his cultural heritage.