You constantly derail the argument with novel conjecture and fantasy. So be it. We shall entertain them for a moment.
Much to your alarm, no doubt, you will find that the "dhimmis" who do escape back to Mata Bharat are immediately classified according to their caste and hence, become vulnerable to the very persecution that, ironically, they avoided by being in Pakistan. The class/caste of hindus remains relevant to their likelihood of survival in Hindustan, hence 5,000,000 choose to stay in Pakistan rather than avail themselves of these supposed Dalit community opportunities in India.
Now you also make comparison with the global chess playing barhadari, but fail to acknowledge the caste of most of those western based migrants - high caste. They already had opportunities back in India and utilised their networks to further their opportunities abroad.
The hitherto more Dalitised folk who have come more recently to UK are the simple tuk tuk drivers within the "gig economy" that you are used to. Feel free to come and see for yourself how these folks are kept in check by the established high caste communities. So much so, that laws have now been passed in this regard.
But let us park our varying hypotheses on the fate of diaspora communities and return to the original assertions made. Jinnah made his thoughts perfectly clear in multiple speeches, with regards to Pakistan's identity specifically. He also described your kind as "incorrigible" decades before any of our people saw the evidence for this manifest in front of their eyes.
It is what it is. A fear of Golwalkar's scheming existed. You will argue it was irrational. I will simply point to the current halaath of your nation and the periodic mob based order instituted on the streets and in the courtrooms. It is up to you to control this halaath and prove Jinnah wrong, if you even wish to that is.