Babar is the father of the nation of the sub-continet! God only know how many Hindu women Akbar married. So all his sons are 50% Hindu. Anyway, all the subsequent Islamic population has not come out of sub-continent but converted under political pressure or for gaining political patronage to adjust their frequency with the ruler.
They are all Indians; but converts.
Even today in Goa you have Brahmin-Christian, Kshatriya-christian, and lower caste-christians and they dont marry across the castes. Under Potugese influence all Hindus got coverted to Christianity under political pressure/ patronage and even got themselves Portugese names!
