If thats the case, and we know that Indias borders extended beyond to the entire subcontinent, then why dont Indians clamor over the fact that Sri Lanka, Buttan and Nepal are also independant states?
The borders of the Mauriyan empire also extended all the way into Afghanistan. So why then do Indians not claim Afghanistan as being part of greater India?
I think the bottom line remans that the borders of India have been in flux for centuries. Just because at one time Indian borders encompassed a certain area, doesnt mean that area is "Indian." If it were, then India could claim all of South Asia including Afghanistan, but it doesnt, except in the case of Pakistan.
Now I don't understand what you are saying. Are you under the impression that India wants Pakistan back inside? That is not the case at all. May be there is a 1% or less crowd that may feel that way but I haven't come across ANYONE who wants that.
Now. many Indians, including me, are angry at Pakistan for attacks in Kashmir and Kargil etc. That is different from wanting to bring Pakistan back.
Of course borders change over time.