You're living in a fools paradise, Indus valley has nothing to do with present day India, India's culture was developed around Ganges and Jumuna river valleys, Indus valley civilization, Gandhara civilization and Mehrghar civilization of Balochistan are unique to Pakistan..nothing to do with India...learn history before commenting......Persian language came much later when muslim empires ruled the region,....before that this region of Indus valley was always separate from what is today's India for thousands of years, except for a few years under one or two empires...then when muslims came ...they combined it with today's india..that too not whole of it...KPK used to be part of Afghanistan..and Balochistan was separate....1947....this region was separated again from India...which was natural......Pakistan means five regions accoring to ch rehmat ali ..who coined this name...Punjab, Afghania (KPK old name), Kashmir, Sindh, balochisTAN....the history of these 5 regions is ancient..and when I say Pakistan's history is ancient...i mean these 5 regions..so stop your obsession with Pakistan.
You can talk to yourself like that in this PDF.
All of this is now a part of Indian civilization and whole world is learn like that.