Whose ownership? Part - II

Like a problem called as "Illegal Immigrants"
Where does this illegal word came from, who declared them as illegal, who got the ownership of declaring them as illegal and who has drawn the boundry.
If they had survival means, why will they be leaving their homeland?
So a Bangladeshi can not work in India but a Nepali can because India has treaty with Nepal. Similarly analogy will be of US, Canada and Mexico.
So poor Nepali's have right to come and work in India but Bangladeshi's don’t have it.