(Reuters) -California Governor Gavin Newsom's veto of a bill that would have banned caste discrimination was seen as "heartbreaking" by the legislation's advocates while being welcomed by those who felt such a law would have stigmatized a minority in the state. The bill itself, as well as the buildup to its passage by state lawmakers and its veto, saw intense debate on the issue in California and beyond. Opponents of caste discrimination say it is no different from other forms of discrimination