It will be a propaganda for Al Qaida to paint Christians as barbarian more than their own extremism and let them paint Christians as uncivilized in their perspective. Extremism often lose international public support, and when you lose public support, you are in bad shape in the war against terrorism. Al Qaida is likely viewing the move of Dove as an opportunity to fuel more attacks through angry local Afghans and view Dove supporting Al Qaida for their purpose of terrorism. In other words, Dove is supporting Al Qaida and terrorism in the perspective of Al Qaida.
They do that already. Truth has nothing to do with it.