Pakistan inki baap ki jaagir nahi to make the rules......... I'll kick these racists to India before I go there.
I have no comments on what actions you want to take, as that is your decision as an individual Muhajir.
However, I must disagree with you on the question of "to whom does Pakistan belong"? And here is why:
Pakistan is (mainly) Punjab, Sindh, Pashtunistan, Balochistan (neglecting small groups). It is almost axiomatic that Punjab belongs to Punjabis, Sindh belongs to Sindhis, Balochistan belongs to the Baloch, and Pashunistan belongs to the Pashtuns.
Therefore, taking inspiration from Chaudhary Rehmat Ali, when we sum Pakistan= Punjab + Sindh + Pashtunistian + Balochistan, what we are saying is Pakistani = Punjabi + Sindhi + Pashtun + Baloch.
These are the people of the Indus. These are the decendents of people of the Indus Valley Civilization (IVC). They have a 5000 year old history and a highly-evolved culture centered around the Indus River System. This history and culture is
entirely distinct from that of the Gangetic-Plains Civilization (GPC), which forms the basis of India (North). In fact, the real difference between India and Pakistan, as countless posters have already said on this forum, is that the former is the inheritor of GPC and the latter is the inheritor of IVC.
So what about the Muhajirun? These are people from the Gangetic-Plains, are they not? So where do the Gangetic-Plains Muhajirun (GPM) fit into the composite picture of IVC-derived Pakistan? What did Ch. Rehmat Ali have to say about the Muhajirun? Did Ch. Rehmat Ali even mention any Muhajirun?
I am sorry to say that the poster you just cursed as "I will kick these rascists.." might actually be correct, even though his view does seem a bit excessively rascist. Pakistan may well be, as you colorfully put it, "inki baap ki jaagir". After all, France is the "baap ki Jaagir" of the French, is it not? So why should the Punjabis, Sindhi, Baloch, Pashtun etc. (IVC-people) be any different?
You might not like to hear this, but then the truth is seldom welcome to many of us. Some of us often prefer to live under the Soft Shadows of a Sweet Delusion, rather than go out into the Harsh Light of the Bitter Truth.