Historically Indians have derived active and passive benefit from being lumped with Pakistanis as "south asians" in a bureaucratic sense.
It has always enabled both a hijacking of Pakistani achievements and a simultaneous plausible deniability of Indian crimes.
Consider the 80s and 90s growing up in UK when "asian unity" against aggression was a trend but in truth, Indians (with the exception of the more active Sikh barhadari) just sort of peeked over the shoulders of Pakistanis to see when it was safe to crawl back out.
Also, consider every time some scam cell centre or some student visa fraud or some hindu/Sikh honour crime is committed in UK that it is reported as a "south asian" matter to permit passive dissociation from India.
But it actually goes well beyond all of that.
It ultimately feeds back into the 1 nation vs 2 nation theory. They have always imagined our nation to be some rebellious sibling that defied Nehru, Gandhi and Golwalkar alike and would ideally be forced to come back into the eternal Bharati Reich one way or another (+/- the population of course).
I think they are quite unsettled by Pakistanis controlling and building their own narrative.
Some of it has to do with choosing to be low key, with the RSS of RSS, Hindutva which should really be called radical Hinduism, that trend is reversing and they're being much more religiously open, it's part of the reason there's a backlash in the Western communities.
I've seen a Hindu funeral establishment boarded as South Asian funerals lol
Another reason is they know how to use lanaguge effectively.
A typical BBC report regarding Pakistan, including those written by Pakistanis.
This is the issue,
there's no law and order,
it's all very disfunctional,
people are suffering,
there migh be a faint reference to official action but its presented as only becuase we the BBC are here otherwise no action would be taken.
Nothing but negative BS.
The same report on india, even if it's far worse would be,
This is the issue,
this was the cause,
this is what happened,
this is how the authorites acted,
that action resulted in positive steps, or investigations are still ongoing,
this is the plan to ensure it does not happen again.
just comprehensive positive BS on even the most vile of events.
Pakistanis just don't understand how longauge works.
Bass bol do, kuch nahin hota, mein sach bol raha hoon.
(just say it, it doesn't matter, I am being truthful)
The context and nuance can go to hell.