Srilanka is not the country for Sinhala people. It belongs to Dravidians (Tamils/Kannadigas/Andhrites/Keralites). Sinhalas are migrated(escapted) from S.E countries and they entered srilanka as refugees and followed buddhism. Please give srilanka back to India and get lost people.
Remember :- It was a massive Tsunami some 7000 years back which submerged land between India & Srilanka and thus forming a separate ISland. It then was occupied by the migrated people. Srilanka belongs to India.
The Tamil people living in srilanka are the oldest community and they have Indian gean. Only sea water separated them. They were not able to get into the mainland immediately after the great Ancient Tsunami.
That is the reason you don't find any face difference between a srilankan (tamil/also few converted sinhala) and a south Indian.