What is Hinduism? India became india only with and after the constitution.

What is Hinduism or sanatana dharma , can you tell me?

Where is, in which Veda or upanishad or purana is Hinduism or sanatana dharma defined?

Did so-called Rama and know what Hinduism or sanatana dharma is and did they talk and preach for such a Hinduism or sanatana dharma?

What are the guidelines given by Hinduism or sanatana dharma you claim to the people to be Hindus or sanatana?

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India became india only with and after the constitution of India that too with a constitution constituting it

Before such a constitution, there were only kingly states. Never integrated. 

If at all there happened any integration of these or some of these kingly states,  that was because of Mughal. Mughals initially integrated these kingly states which was further followed and increased  by the British.

All other claims are mere just sham romanticised claims.