Chavez did not like illegals taking jobs.
Chavez was against Illegal Immigration.
Too much Competition for the Union Workers he represented.
My F-I-L worked for the big CA Growers. He knew Chavez personally, even went to his House for Barbecue.
They obviously disagreed on Business since they sat on opposite sides of the Bargaining Table, but they respected each other. They were both Ex Navy, so that may have been part of it.