I can't believe I'm about to defend this ridiculous place...
I was born and raised in the San Joaquin Valley, and what you say doesn't even begin to resemble my experience. While it's certainly true that I've known a handful of racist white people, they've been an oddity in my life. As for segregated neighborhoods, I'm a white guy surrounded by Mexicans. I've also had Black neighbors in this same neighborhood, in years past, so I'm really not seeing where you're coming from, there. Furthermore, I've never seen anyone turned away from a bar, due to their race (granted, I don't spend a lot of time in bars).
As for the Bi-Lingual Education thing, that came about because Spanish-speaking students had a lower collective GPA than English-speaking students. The thought was that the students were failing because they couldn't understand the language in which the lessons were being taught. So, they teach the primary curriculum to them in Spanish, and then they're supposed to also teach them English as a Second Language. I went through the local public school system, and I haven't met any Mexicans who both grew up here and don't know English. Generally the Mexicans I know who don't speak English very well, are immigrants, and especially immigrants who came over here later in life. I've had friends whose elderly grandparents didn't learn English at all, but if you're 75 and immigrating just to be with your kids and grandkids, then I think that you can be forgiven for not learning the language, and I don't think I'd expect you to, let alone require it.
Don't get me wrong. We've got an abundance of hateful, intolerant people in this state, but they're usually not racists, unless they're racist toward white people, but even that isn't terribly common around here. There's a lot of man-haters, rich-people-haters and Trump-haters (can't swing a cat without hitting one), but people hating on Mexicans, Black people or Asians are strange and unusual. If you told me that this was the most hateful state in the union, I'm not sure that I could disagree so easily, but to describe California as racist just doesn't mix with what I see around me.