South African racial tensions thwart opposition challenge to ANC

By Stella Mapenzauswa JOHANNESBURG (Reuters) - A racist Facebook post by a member of South Africa's main opposition party has caused a national furore and left it scrambling to shake off its image of an organisation that chiefly serves the interests of the minority white community. The episode highlighted how racial tensions simmer in the country more than two decades after Nelson Mandela become its first black president, with wealth and income gaps that are still clearly visible along race line