I wonder what is it with this denial of the existence of India prior to 1947. If people were specific and said that they were referring to the Republic of India as the successor state to British-controlled India, then it would at least make some sense. Otherwise it sounds completely insane.

If India was invented 79 years ago, then you need to explain the various East India companies established in the 1600s, and all the references to India and the Indians by the Romans and the Greeks and the Persians and the Chinese before the Abrahamization of Europe. Europeans were literally looking for ways to India and ran into the West Indies and North America by accident.