"Muslims" in Indian subcontinent are not muslims, they should be reclassified as Mundus

I found this on another web forum. 70 Crore (700 million) "Muslims" in India and Indian Subcontinent are not muslims. They got converted forcefully just few hundred years back. In fact, Indonesian Muslims who are much older "Muslims" consider themselves to be of Hindu Lineage so how come thees 0% muslims of Indian subcontinent are considered muslims? 

They should be called Mundus from now on. There is no muslims in Indian subcontinent.