This article from The American Conservative points out facts about Cesar Chavez that neither the minimum wage nuts or the la raza crowd will want to hear. Chavez opposed illegal immigration because it would harm American workers and depress their wages.
"Chavez’s essential problem was straight out of Econ 101, the law of supply and demand. He needed to limit the supply of labor in order to drive up wages. Just as American Federation of Labor founder Samuel Gompers, himself a Jewish immigrant, was one of the most influential voices calling for the successful immigration-restriction law of 1924, Chavez, during his effectual years, was a ferocious opponent of illegal immigration."
"The UFW picketed INS offices to demand closure of the border. Chavez also finked on illegal alien scabs to la migra. Columnist Ruben Navarrette Jr. reported in the Arizona Republic, “Cesar Chavez, a labor leader intent on protecting union membership, was as effective a surrogate for the INS as ever existed. Indeed, Chavez and the United Farm Workers Union he headed routinely reported, to the INS, for deportation, suspected illegal immigrants who served as strikebreakers or refused to unionize.”
Like today’s Minutemen, UFW staffers under the command of Chavez’s brother Manuel patrolled the Arizona-Mexico border to keep out illegal aliens. Unlike the well-behaved Minutemen, however, Chavez’s boys sometimes beat up intruders."