I disagree - the IVC for example has very little known about it to make the argument that it was in any way even remotely similar, religiously, to modern Hinduism. I'm not an "Arab or Persian or Afghan or Ottoman or Central Asian or part of any of the civilizations linked to those groups for following Islam and the Arab/Persian/Afghan/Ottoman/Central Asian practices that were brought into what today is Pakistan, over millenias.
You seem to think that cultural and civilizational evolution in South Asia followed some kind of linear and geographically delimited process, which then allows you to pigeon hole arbitrarily chosen peoples and lands into this expansionist Hindutva template of 'Indian Civilization and One India'.