Mr. Sivaprasad, The notion of dravidians being the first occupiers of the land, and that of Aryans invading the land subsequently is no longer accepted. Current science based on genetic research does not show any differences between Aryans and Dravidians.
All the DK/DMK progress has been limited to the late 1960s, they still live in Radio time my friend. Progressive beliefs should also be up to date with current affairs.