"One of the more negative parts of the march was when American flags were passed out to make sure the marchers were looked on as part of 'America,'" said the group's commentary on the L.A. rally.

Both Rep. James Sensebrenner, R-Wis., chairman of the House Judiciary Committee and a proponent of tougher border security, and California Gov. Arnold Schwarzenegger were caricatured as Nazis by the group on its posters and banners.

The group insists the indigenous people of the continent were the victims of genocide – a campaign of extermination that killed, according to one citation, 95 percent of their population, or 33 million people. Another citation on the same website claims the toll was 70 million to 100 million.

The only solution, says the Mexica Movement, is to expel the invaders of the last 500 years, force them to pay reparations and return the continent to its rightful heirs.

The platform of the group illustrates the diverse – and sometimes extreme – agendas of those participating in the mass mobilizations that have been seen largely as protests against efforts to curb illegal immigration.

Some of those involved, including the Mexica Movement, have much bigger goals than stopping a piece of legislation before Congress.

The Mexica Movement has big issues with many other equally radical groups participating in the massive, united-front rallies. The group makes a point of distinguishing its goals and objectives from others, such as the separatist Aztlan Movement.

Aztlan, the mythical birthplace of the Aztecs, is regarded in Chicano folklore as an area that includes California, Arizona, Nevada, New Mexico and parts of Colorado and Texas. The movement seeks to create a sovereign, Spanish-speaking state, "Republica del Norte," or the Republic of the North, that would combine the American Southwest with the northern Mexican states and eventually merge with Mexico.

A group called "La Voz de Aztlan," the Voice of Aztlan, identifies Mexicans in the U.S. as "America's Palestinians." Many Mexicans see themselves as part of a transnational ethnic group known as "La Raza," the race. A May editorial on the website, with a dateline of Los Angeles, Alta California, declares that "both La Raza and the Palestinians have been displaced by invaders that have utilized military means to conquer and occupy our territories."

Others in the coalition hope to see a "reconquest" of the American southwest by Mexico. This would not likely take place through military action, they say, but rather through a slow process of migration – both legal and illegal.