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Thanks for posting this. I will be in Tamil next year and never thought about learning Tamil because of the short time I was planning to stay but it is respectful to at least try to speak and listen to a few things they are saying. My friend from Tamil never says he is "Indian." He always introduces himself saying, "I am Tamil from Tamil Nadu."

Tamils are extremly proud of their language, history and heritage. And yes, significant portion of Tamils in TN (though still far from majority) identifies primarily as a Tamil, and Indian only by default. And in past, ethnic nationalism was even stronger. Alas, main opposition party in the state assembly, DMK was founded with the agenda of establishing independent Dravida Nadu, and dropped it from party platform only after patriotic fervour of Sino-Indian War in 1962.

Nice reference source, thank you!