Caste is not a protected class under US or CA labor laws, so they are legally correct. In a nutshell: discrimination on the basis of one of the enumerated prot

Caste is not a protected class under US or CA labor laws, so they are legally correct. In a nutshell: discrimination on the basis of one of the enumerated protected classes is unlawful. This list includes sex, gender, race, religion, and nationality, among the big ones. (Note: the list does not generally include ethnicity, which is roughly defined as "cultural identity.") All other forms of discrimination, while potentially actionable for other reasons, are not prohibited. Thus, for example, in most states, you can be fired based on your political affiliation (though not in CA). As the US and CA do not have histories with caste systems, and potential cases represent such an insignificant fraction of possible cases, it was never made illegal here. Arguably, caste discrimination is just a form of racial discrimination, but the plaintiff will have to connect the dots for the court to show the tie between caste and race.