It’s talking about hiring discrimination, so that information seems relevant to me. I’d bet that a number of groups would face hiring discrimination in the trades in the US, here in Australia, etc.
A majority of construction workers in San Jose, CA are Hispanic, as are the construction companies.
Maybe they discriminate against Blacks. Maybe they also discriminate against folks whose ancestors came from a diferent country. (Do Mexicans tend to like Columbians?)
That said, if there's discrimination in construction in San Jose, it isn't by whites.
Why would that discount its relevance? It just says that he faced discrimination. And why would a majority of Hispanic-dominant companies mean that the remainder wouldn’t discriminate? Presumably it’s something he raised as a challenge when interviewed.
Did he say that he faced discrimination by whites?
As to your assumption that Hispanics don't discriminate, you haven't spent much time with them. (They aren't as racist as Indians or Chinese, but that's a low bar.)
Where did I assume that Hispanics don’t discriminate?! I think every group would have a tendency to. I’m just saying that I don’t see where it’s relevant which group did, just that he faced discrimination and that it would be a relevant part of the “challenges” backstory.