If you don't want to use the term 'India', you can't use 'Hindu' either: Shashi Tharoor

economictimes.indiatimes.com:

Shashi Tharoor on Friday took a swipe at those who have a problem with the term 'India' but are comfortable calling themselves 'Hindu', although both the words, India and Hindu, are derived from the same etymology, which is river Sindhu.
Dwelling on the origin of the term 'Hindu' during the launch of 'Nanu Yaake Hindu', the Kannada version of his book 'Why I am a Hindu', the Thiruvananthapuram MP said both the words were given by foreigners to describe people beyond the river Sindhu or Indus.
Tharoor's book has been translated from English to Kannada by Congress leader Prof K E Radhakrishna.

In the midst of the 'India versus Bharat' debate, Tharoor said, «It's very ironic when I hear some people in the ruling party objecting to the use of the word 'India' saying that it is not authentic and the same people shout slogans saying 'Garv Se Kaho Hum Hindu Hain'.» «Well, 'India' and 'Hindu' are derived from the same etymology. If you don't want to use 'India', you can't use 'Hindu' either. They both come from the same source, from the river Sindhu,» he explained.

Tharoor said it is still interesting that Hindus call themselves by a label that they did not invent themselves in any of their own languages, but «adopted it cheerfully when others began to refer to them by that word».

Noting that some Hindus prefer an altogether different term, 'Sanatana Dharma', he said Hinduism is just a name that foreigners gave for what they saw as the indigenous religion of India.
Hinduism, according to the Congress MP, embraces an eclectic range of doctrines and practices, which believes in reincarnation and in the caste system. «But none of these constitutes an obligatory credo for a Hindu.