Cesar Chavez Was A Labor Leader, Against Illegal Immigration
Ruben Navarrette, Jr., writes at CNN.com that Chavez was no champion of immigrants -- quite the contrary:

He was primarily a labor leader who was concerned about illegal immigrants undercutting union members, either by accepting lower wages or crossing picket lines. He never pretended to be anything else, and he resisted attempts by others to widen his agenda. When he pulled workers out of the field during a strike, the last thing he wanted was to see a crew of illegal immigrant workers take away his leverage.

According to many historical accounts, Chavez ordered union members to call the Immigration and Naturalization Service and report illegal immigrants who were working in the fields so that they could be deported. Some UFW officials were also known to picket INS offices to demand a crackdown on illegal immigrants.

In the 70s, the UFW set up a "wet line" to stop undocumented Mexican immigrants from entering the United States.

Under the supervision of Chavez's cousin, Manuel, UFW members tried at first to persuade Mexicans not to cross the border. One time when that didn't work, they physically attacked and beat them up to scare them off, according to reports at the time. The Village Voice said that the UFW was engaged in a "campaign of random terror against anyone hapless enough to fall into its net." A couple of decades later, in their book "The Fight in the Fields," journalists Susan Ferris and Ricardo Sandoval recalled the border violence and wrote that the issue of illegal immigration was "particularly vexing" for Chavez.

UFW loyalists will never admit to this ugly history. But that doesn't change it.