Apartheid Era Joke

Context:
Two of my co-workers were arguing about who can be considered African. A woman who is of Indian heritage stated that she was born in Africa and she is African. A man who is black bases his understanding of African people based on race. Who is African? is a very fascinating question. Anyway, to break the ice, my male co-worker asked if he could tell a joke:
During the Apartheid, a beach was labeled to be a whites only beach (only whites could swim on the beach according to law). An Indian started swimming on the beach. A white person told him, "Can't you read? You can't swim on this beach. It's only for whites." The Indian replied, "You can't tell me I can't swim here. This is the Indian Ocean!"
hahahahaha