Cisco HR said "caste discrimination was not unlawful". Doesn't California's Unruh Civil Rights Act prohibit employment discrimination in a businesses based on

Cisco HR said "caste discrimination was not unlawful". Doesn't California's Unruh Civil Rights Act prohibit employment discrimination in a businesses based on ancestry, especially given the CA Supreme Court's repeated determination that the list of protected classes should be interpreted broadly? So why wouldn't caste discrimination be illegal under that law?