As i said, history got nothing to do with the recent Political events. Also I mentioned before there is more to IVC then two cities. Apart from that look at the findings at the sites, the existence of Swastika, Shiva/Pashuathy, Mother goddess, Stone lingams from Mohenzodharo etc proves the connect with the people of other area of the lands of Ancient India.
Normal IVC town were divided into 2 parts.
(1) Raised citadel- meant for elite, rulers dwellings.
(2) Lower town- common people lived.
Dholavira is the only Indus city with 3 parts- Middle town was extra feature.
Kotdiji, Amri, Harappa, Kalibangan and Banwali are associated with Pre-Harappan.
Harappa, Mohenzodharo, Kalibangan, Lothal - Matured Phase of civilization.
Rangpur, Rojdi, Rakhigarhi, -later phase.
People lived there and moved to other places or perished due to rivers drying up and the civilization collapsed in 1900 BC. The continuity of the practices of people does show a huge connect between the people of the land..
Also, show us one Historian/Archeologists worth his salt who would have said IVC is Pakistani. On the other hand, there are plenty who rightfully associate it with India.