What?
#1, 99% of Indian people don't follow the caste system in 2018. That's some @#$@ that mostly happens in remote villages along with forced marriages, cow worship, etc. that America loves to display in the news to stereotype all Indians.
#2, 99% of Indian people would NEVER identify as white. My mom and her family are descended from and look like Southern Europeans (they're even more light skin than my European family), but you'll never hear them claim to be white or European. Most don't want anything to do with white people due to the British robbing the country blind; the only Europeans that get a pass are Asian washed/ethnic looking ones like my dad that prove that they respect and appreciate different cultures.
People like Nikki Haley are like the Ninjahoods of Indians. They don't claim us now, but we haven't claimed them since they decided to burden the planet with their emergence. There's a lot of derogatory terms for them in Indian/Asian culture.