So far, apparently, the atrocities have been minimal by Afghan standards. That could certainly change at any moment.
BTW, the term "atrocity," at least as applied to the killing of surrendered or captured enemies, is a classic example of cultural imperialism. Who are we to say that our values are better than theirs? Killing your enemies is probably the oldest and most valued Afghan tradition. We should learn to value this diversity. Who is to say that our values are better than those of Apartheid South Africa.