No, not really. That there are people hostile to the US and to American citizens in Afghanistan, who are actively pursuing hostile actions against the US and American citizens, is an established fact. For better or for worse, we also have soldiers over there. The NSA's job is to gather intelligence on the enemy. That they have the capability to surveil all communications in Afghanistan is a good thing in this case, and that is, clearly, what they are supposed to be doing.
The NSA surveilling Doctors Without Borders, or Angela Merkel, or the communication between, say Belgium and the Netherlands (let alone all of American citizens within the US borders which is outside of their jurisdiction), is a stupid and paranoid waste of time, money, energy and that merits scrutiny and criticism. Not Afghanistan though.