Fidel Castro has brilliantly fought for the advancement of the Cuban people. That is not to say that he is beyond critique for his violations of human rights which, to some extent, he now seems to acknowledge were wrong - based on the tone of some of his writings in Granma.
The US propaganda against the Cuban revolution has had a profound effect. Many Cubans, Puerto Ricans, Venezuelans, Chileans, Peruvians, Ecuadorians, Salvadorians, Nicaraguans, and Hondurans in the US, have bought into the negative picture US propaganda paints against the Cuban revolution and Fidel Castro. I've found anti-Castro sentiment among Latinos from Florida, to NY/NJ, and up to Chicago. I remember a poll, several years ago, that found feelings for Fidel Castro, among Latinos, varied from country to country. For example, in Peru, which ended a bloody insurgency by the Sendero Luminoso, the feelings for Castro are overwhelmingly negative.
I am not sure of any similar polling on attitudes of US Latinos towards Fidel Castro. My experiences are only anecdotal and I don't know how it is on the West Coast, which does have a large Latino population. My sense is that sentiment against Fidel Castro does seem to by diminishing among younger Latinos and among Latinos of Columbian and Mexican heritages.