That is hardly a yardstick.
If the sole criteria for discrimination was migration, then I assume blacks were never discriminated in the US and South Africa.
Discrimination is a wide word. Political, religious, economic, sexual discrimination and the list goes on. Simply put where will an Ahmedi feel safer? In India or in Pakistan? Likewise where will an upper class Pakistani Hindu feel more privileged and safer? In India or Pakistan? In India there are no laws which I am aware of which restricts the economic activity of Muslims or any other minorities. Likewise, there are no laws passed which discriminate against Muslim or any other minority Indians.