US divorce may or maynot be valid in India depending upon whether it was mutual, contested or ex-party. India does not respect US/foreign divorces unless the grounds and proceedings are compliant with the Indian law. India is not a party to the Hague Convention or Private International Law. You may need to also get it validated in India. You need to be concerned only if the ex spouse is vindictive. Even people who got contested divorce in US have been later jailed and harassed using false allegations under section 498a. Check out for stories on how simple divorces got transformed into multi-year battles. The site provides help to people who are facing harrassment due to gender biased laws in India.
Please don't follow the attorney's advice blindly. Make sure that the attorney has your best interests in mind.
Disclaimer: I am not a lawyer and this is not legal advise.