Morally, it may be obvious to us that that's how it should be, but the law doesn't work like that. The law runs on precedents. Taken another way, the law is like code. The "architects" of the code are the legislature who write the laws, and the "programmers" are the judges, who decide exactly what goes in the if-else conditions, based on their interpretation of the law, and those become precedents the next time someone revisits that condition.
The U.S. law on the matter doesn't explicitly mention caste. There are constitutional originalists who take a very "conservative" approach to applying the law, and they might say it isn't illegal until the law is changed to explicitly forbid caste discrimination. When I was growing up, I knew some conservative Indians who would've taken that stance.
The Cisco discrimination suit is the first test of the law, and is likely setting the first precedent. Apple has decided its position (make of that what you will), and chosen to get ahead of the game.
The U.S. law on the matter doesn't explicitly mention caste. There are constitutional originalists who take a very "conservative" approach to applying the law, and they might say it isn't illegal until the law is changed to explicitly forbid caste discrimination. When I was growing up, I knew some conservative Indians who would've taken that stance.
The Cisco discrimination suit is the first test of the law, and is likely setting the first precedent. Apple has decided its position (make of that what you will), and chosen to get ahead of the game.