This sort of mindset is what is hampering India. Be Indian first, then think south or north. Soldiers at the border are from the entire country and they are protecting our entire nation, not "south" or "north"
That's the whole point, India needs to be hampered so that we can save ourselves. I have my own language and culture. I don't have to be an Indian first. I am free to be whatever I want to be.
AFAIK, you are. India has contributed millions in foreign aid to rebuild Afghanistan and contributes a significant number of troops to UN peacekeeping forces.
Then don't pay taxes. See, right now you have North India as a buffer against West Asian hordes like ISIS. If North Indians stop defending you, then you will have this border right up to your nose.