They're Mexicans (on the mom's side) of Ashkenazi descent, classmates of my boys.  Our two families nicely illustrate how the combination of race, language, religion, and heritage all work together to obscure the definition of hispanic.

My dark skinned son wears his central american heritage on his face, but though everyone sees him as latino he's being raised in an anglo household.  His white classmate is being raised in a spanish speaking family that values and preserves its Mexican heritage.  They're both hispanic, but about the only thing they share in common is the Jewish part.  Oh, wait . . .