Comment by sieve

It is a name. The identity comes from the rituals, beliefs, clothing, literature, temples, architecture, food and so many other cultural and civilizational markers.

Pakistanis who were looking for their fathers in Arabia, Persia and Turkey in the past based upon a deliberate avoidance of their Indic origin have recently started a political project to reclaim their identity based upon the IVC. They can try all they want but civilizational continuity is the only thing that matters. Names are dime a dozen. If you have a problem with Hindu/India and other exonyms, you could always call yourself Bhāratīya or some such. It is all the same.