In South Africa, many Tamil Hindus, when asked what their religion is, say "Tamil", not "Hindu". "Hindu" to them, refers to Hindus of North Indian descent (of Gujarati and Hindi origin). Since their ancestors came to South Africa more than 150 years ago, this sort of separatist instinct seems to long predate modern India.

http://www.quora.com/Hinduism/In-South-Africa-many-people-of...