Wa Salamun alaikum, dear Sumaira!
I should pass no judgments. The darker-skinned Tamils were treated as inferior by the lighter-skinned Sinhalese. The wedge between them was purely ethnic and linguistic.
The Tamil wanted a separate land of their own within the tiny country and refused all negotiations for 28 years.
True that humans still need to conquer ethnic and racial hatred. Recall what happened between West Pakistan and East Pakistan in 1970. No doubt, India was a great malefactor in that instance as well.
Ah, the Last Sermon of the exalted Prophet!
49:13 O Mankind! We have created you male and female, and have made you nations and tribes so that you may come to know one another. Certainly, the most honored among you, in the Sight of God, is the one who is best in conduct. God is Knower, Aware.
[Min zakarinwwa untha = Of a kind that is male, and of a kind that is female = Male and female = Some of you are men and some of you are women. On this note I find myself in agreement with M. Pickthall 39:6]