If those killed were actually anti-al queda, somebody's head is going to roll. However, thinking drones are 'terror tools' is laughable. Ask the vast majority in the tribal area of pakistan what they fear more: Indiscriminate pakistani bombings, or relatively precise drone strikes that doesn't even stop wives from going over to her friend's place.
In other news, more ugly muslim racism and killings visited upon africans, specifically african christians in Nigeria.
Drones are cost effective and efficient. If these people want to play the killing game, we will continue to kill them until the end of time. Nice try putting 'political' pressure, but their attempts at trying to manipulate world opinion is pretty cute. They even convinced themselves they are succeeding.