This is entirely predictable; there’s a reason that during communal riots men are forced to expose their penises, aside from dress distinguishing a Muslim from a Hindu is not really possible.
A small number of very high status Muslims are obviously predominantly non-South Asian, they look different.
“It’s a mistake to think this is the endpoint of enormous change.
Overall, our results support a model according to which the spread of Islam in India was predominantly cultural conversion associated with minor but still detectable levels of gene flow from outside, primarily from Iran and Central Asia, rather than directly from the Arabian Peninsula.
Islam is the second most practiced religion in India, next to Hinduism.