Christians stayed to benefit from the void created by the "Hindu Baniya migration" from the business districts of Pakistan. These "Hindus" stayed because they wanted to escape the "Brahmanical tyranny".
Both deserve such treatment.
I don't think this is correct. The whole subcontinent was dirt poor and illiterate during independence/partition and most people from the time barely had any political opinions. The people simply fell victim to the jingoism of their community leaders and blindly followed them. The descendants of Hindus and Christians who live there continue to live in abject poverty and in worse conditions than their ancestors because the Paki governing machinery turned out to be a wolf masquerading as a sheep. I won't deny that I do feel some schadenfreude of the Ahmediyyas (one of the biggest advocates for the partition) suffering the consequences of their decision but I disagree that the Hindus and Christians that live there "deserve" to be treated like animals for the decisions made by their naive, illiterate ancestors.
Christians are mainly in their Punjab and are descendants of low caste/dalit hindus of that area.
As in literal bhangis etc, indeed such people would fill the void of the Hondu khatri/baniya whatever
Hindus are mainly in Sindh, and these are the poor people of that region, all the wealthy -wanis escaped into India because they too would be made paupers by the green govt and people.
TLDR is that the Christians and non-bourgeois Hindus were so weak and pathetic in the first place that your average greedy momin didn't bother to riot, massacre and rape them into escaping to Bharat.
Unless such "incentives" of RAALIVE, SAALIVE GAALIVE are not provided, people will not be willing to leave their property and other assets to live in the squalor of a tent-city in Delhi.
It is similar to the meme of how the green folks stayed here because of "patriotism".
They simply stayed here because the Hindus didn't remove them.
In Punjab and Jammu where they were removed with extreme prejudice, they went to the Land of the Pure