RIYADH, Saudi Arabia — Saudi Arabia has abandoned its traditional policy of discretion in recent weeks, signaling deep anger at the Obama administration’s Middle East policies and threatening to break with its most powerful ally and pursue a more robust and independent role in supporting the rebellion against President Bashar al-Assad of Syria. But privately, Saudi officials concede that their efforts to forge an alternative strategy in Syria have run up against the same issue the Americans face: how to bolster the military might of a disorganized armed opposition without also empowering the jihadists who increasingly dominate its ranks. And while Saudi officials have hinted at a broader diplomatic shift away from the United States, their options are limited there, too: Saudi Arabia is dependent on American military and oil technology, and the other countries the Saudis have courted — including France and India — can help only on […]