I assumed white mostly meant to old wave of immigrants from Europe... from Italy, Poland, England, Ireland, Russia, Spain, France... etc.

The immigrants are mostly Hispanic... from South America. (There are plenty of families in South America, especially Argentina, who will tell you they are "white" because their ancestors came over from Spain, Italy, Germany, etc., as recently as WW2. But if they then move here, I think we still mostly lump them in as "Hispanic".)