The creation of a nation state called "India" by Pandit Jawarlal Nehru on 15th August 1947, while knowing full well that the River Indus and its legacy civilisation was not the substantive part of this new nation state, is the PRECISE DEFINITION of the bolded text in your comment.
Your nation should have been called Bharat or Hindustan or anything else on its inception, yet Nehru chose deliberately to appropriate a neighbouring nation's ancient history and birthright.
The appropriation continues to this day, and Pakistan, the true inheritors of the IVC, will reject your assertions. You will remain confused until we sort this mess out - understandable.
@Foinikas for your interest, I have often drawn a similarity between Pakistan's objection to India even calling itself "India" in the above context, with FYROM using "Macedonia" in its identity politics, when the true historical Macedonia of Philip and Alexander actually has nothing to do with

.
It is partly our own fault in Pakistan that this has happened, but now we are pushing back against false projections of pseudo-history from neighbouring nations.