Could Warren Buffett’s Berkshire Hathaway be helping to support genocide in Darfur? The Sudan divestment movement — which has persuaded Harvard, Yale and Stanford, among others, to sell holdings of companies doing business in Sudan — says Berkshire should do the same. Buffett’s resisting. They’ll tangle over the issue next month at the company’s annual meeting... Berkshire has become a target for the divestment campaign because it owns 2.3 billion shares of PetroChina Co., a subsidiary of the state-controlled China National Petroleum Corp. (CNPC). [also refers to pressure on Fidelity Investments to divest from Sudan; state-owned oil companies of Malaysia and India (Petronas, ONGC)]