And to say that Hindi should not be a unifying language of the country is like saying every state should have it's own National Anthem in it's own native tongue!
Learning Hindi in school days, makes a student's life hassle-free and easier when he has to migrate to other states for studies. Not all off-the-campus people know English or your mother tongue.
If the majority of people in Tamil Nadu decide to believe DMK’s cock and bull story, then people of the state are the most gullible population in the world.