Sadly you are not in reality and all you do is...
as per your post if TN was a separate nation you would have declared a war and saved all the brothers and sisters.... it will not be so simple
. Have you once thought if you were a separate nation who will be your biggest threat
..... Yes, it would be India with whom you would be sharing borders and resources...
if you still want war... srilanka would get help from big India and you would have to fight two nations.... and for remaining part i leave it to your imagination...
so get out of your wishful thinking and start living in reality... and yes i am v.sorry to have to burst your bubble