Indians are really obsessed with rape...Nope? Sorry, dear...Ever heard about Sufis? What role did they play in reverting people back to Islam? How Rajputs/Jutts (martial races) accepted Islam?
Islam may be foreign religion for you but not for others. As inhabitants of Sub Continent accepted Islam, it becomes religion of land aka South Asia.
India is just geographical expression, nothing more. U derived name India by Indus, which lies in Pakistan, mostly.
Pakistan is thousands year old, we didn't come out of thin air. Land is old, so are the people...So, what if they accepted Islam, its their choice. Just because someone changed religion, doesn't mean he or his land has no history There was no India before British arrival.