The difference between Tamil spoken in Tamilnadu and Srilanka is much higher than the difference between Tamil spoken in diff parts of Tamilnadu, say Madurai and Coimbatore. The difference is almost near to the difference between Tamil and Malayalam, or Tamil and Kannada, or even Tamil and Telugu. If they name their language as something else(say Elam or Elabasha or whatever), I am sure there wont be any loss of lives as it is today. The politicians in Tamilnadu will not try to play Linguistic politics as they do now.
They say that being a minority tamils are not given equal opportunities, jobs etc in Srilanka. But the same condition prevails in India, in Tamilnadu for the minorities, those who do not belong to Scheduled Caste or Backward Caste. If left alone Srilankans will find a way, themselves, to live peacefully. These cheap politicians in Tamilnadu create havoc in Srilanka to stay in power.