KABUL – Suicide bombings, assassinations of top Afghan leaders, brutal attacks on Charikar and other places close to Kabul, Afghanistan’s capital, and a rapid increase in civilian deaths from drone attacks are jeopardizing the withdrawal of American and NATO forces from the country. So pervasive has the violence become that Ahmed Rashid, the renowned expert on the Taliban, has concluded that speeding up the peace process through dialogue with the insurgents is the only option.