Do they have Pashtuns. balochs, saraiki, Hazara, Hindko, Barahvi, Gilgati, Sindhi, Pothohari ? dont say they have sindhis... sindhi dont make a fraction of their population and all of them migrated from sindh to India... India have no sindh like Punjab
most probably those sindhis have mixed with marathis or gujrati and are no more sindhi except few..
do we have tamil telgue, marathi, kathiwari, Malayalam, naga, bengali and many thousand groups that India posses?
The only ethnic group they share with us is Punjabi.... and they will get their freedom from India, if not now, then latter...