You have been fooled by your state politicians.
If you think that the first set of population to migrate to India owns the whole country then indigenous people of Negroid race of Andaman-Nicobar Islands are first to migrate to India.
http://en.wikipedia.org/wiki/Andamanese
You are talking about North Indians and South Indians, both belongs to Caucasoid race. They arrived in India in later years. North Indians and South Indians are are same and none of them is invader. At least the genetic similarity proves that.
The study was conducted by CCMB scientists in collaboration with researchers at Harvard Medical School,
Harvard School of Public Health and the Broad Institute of Harvard and MIT. It reveals that the present-day Indian population is a mix of ancient north and south bearing the genomic contributions from two distinct ancestral populations - the Ancestral North Indian (ANI) and the Ancestral South Indian (ASI).
The study analysed 500,000 genetic markers across the genomes of 132 individuals from 25 diverse groups from 13 states. All the individuals were from six-language families and traditionally ``upper'' and ``lower'' castes and tribal groups. ``The genetics proves that castes grew directly out of tribe-like organizations during the formation of the Indian society,''
``The initial settlement took place 65,000 years ago in the Andamans and in ancient south India around the same time, which led to population growth in this part,'' said Thangarajan. He added, ``At a later stage, 40,000 years ago, the ancient north Indians emerged which in turn led to rise in numbers here. But at some point of time, the ancient north and the ancient south mixed, giving birth to a different set of population. And that is the population which exists now and there is a genetic relationship between the population within India.''
http://timesofindia.indiatimes.com/news/india/Aryan-Dravidian-divide-a-myth-Study/articleshow/5053274.cms
This theory, originally devised by F. Max Muller in 1848, traces the history of Hinduism to the invasion of India's indigenous people by lighter skinned Aryans around 1500 BCE.
The theory was reinforced by other research over the next 120 years, and became the accepted history of Hinduism, not only in the West but in India.
There is now ample evidence to show that Muller, and those who followed him, were wrong.
Why is the theory no longer accepted? The Aryan invasion theory was based on archaeological, linguistic and ethnological evidence.
Later research has either discredited this evidence, or provided new evidence that combined with the earlier evidence makes other explanations more likely.
Modern historians of the area no longer believe that such invasions had such great influence on Indian history. It's now generally accepted that Indian history shows a continuity of progress from the earliest times to today.
The changes brought to India by other cultures are not denied by modern historians, but they are no longer thought to be a major ingredient in the development of Hinduism.
Dangers of the theory The Aryan invasion theory denies the Indian origin of India's predominant culture, but gives the credit for Indian culture to invaders from elsewhere.
It even teaches that some of the most revered books of Hindu scripture are not actually Indian, and it devalues India's culture by portraying it as less ancient than it actually is.
The theory was not just wrong, it included unacceptably racist ideas:
- it suggested that Indian culture was not a culture in its own right, but a synthesis of elements from other cultures
- it implied that Hinduism was not an authentically Indian religion but the result of cultural imperialism
- it suggested that Indian culture was static, and only changed under outside influences
- it suggested that the dark-skinned Dravidian people of the South of India had got their faith from light-skinned Aryan invaders
- it implied that indigenous people were incapable of creatively developing their faith
- it suggested that indigenous peoples could only acquire new religious and cultural ideas from other races, by invasion or other processes
- it accepted that race was a biologically based concept (rather than, at least in part, a social construct) that provided a sensible way of ranking people in a hierarchy, which provided a partial basis for the caste system
- it provided a basis for racism in the Imperial context by suggesting that the peoples of Northern India were descended from invaders from Europe and so racially closer to the British Raj
- it gave a historical precedent to justify the role and status of the British Raj, who could argue that they were transforming India for the better in the same way that the Aryans had done thousands of years earlier
- it downgraded the intellectual status of India and its people by giving a falsely late date to elements of Indian science and culture