Do you have a citation on him working with Alinsky?
I grew up in CA where Cesar Chavez Day is a state holiday, and assumed that was widely known. Saul Alinski and Fred Ross founded “Community Service Organization”, the organization that trained community organizers and agitators in Alinsky’s tactics. Ross was more the “West Coast” guy, and worked closer with Chavez than Alinsky, but Cesar Chavez was most definitely an “Alinskyite” and a prodigy of Saul’s. Chavez left CSO to found the UFW, fully trained. There is plenty written about Chavez, Alinsky, Ross and CSO, but you would have to visit some hardcore leftist sites (or books) to read about it.