A Muslim Indian is kind of annoyed that I say “Muslims in the subcontinent are descended from Hindus.” By this, I mean 99% of the ancestry.
Of course, it can be hard to see the impact of Iranian ancestry. I’m going to look more closely to update my estimate.
I recently got contacted by a British research group. They sample thousands of Bangladeshis, and unlike the Pakistanis, they saw no internal structure aside from some individuals who seem to be a Tibeto-Burman tribal people. Like I said: the Bangladeshis might be called Hindus by Pakistanis, but the Pakistanis marry like they’re Hindus, the Bangladeshis don’t.