What is incumbent on every Indian...???

First Scrap that God damn Indo-Nepal friendship treaty and think anew, afresh. It was more of a Nehru-Nepal treaty than anything Indian. The clauses of that treaty ( if you read) are outrageously against the interest of Indians and seem as the brainchild of a country bumpkin rather than a visionary Leader.
The treaty in question has in due course created critical internal problems pertaining to citizenship, civil rights, territorial integrity and the like.

Furthermore the presence of Nepalese and their identity as Gorkhas pose a great threat to aggravating extant internal contradictions and the future of this country with respect to terrorism and assertion of self determination by legitimate denominations and their political settlements thereupon.

For a country as big as India such contradictions are bound to prevail owing to its multi-cultural, multi-linguistic,ethnic and religious diversity. These would require deft handling and long term strategic planning on the part of gifted leaders if this country is to be kept integrated.

Conceding legitimacy to the concept of Gorkhas would surely jeopardize many prospective political remedies that this country may have to make from time to time as and when situation demands.