During 'Home Invasion' how is spectator implicit in the attack?

During 'Home Invasion' how is spectator implicit in the attack?

During the Home Invasion scene, there are many techniques used to make the spectator implicit and keeping the spectator aligned with Alex even after horrifically raping someone.
One way this is done is by Alex wearing a mask during the attack. With Alex's face hidden the spectator is unfamiliar with the attacker even though we know it is Alex, this means anything evil he does (within reason) has very little effect on the spectators perspective of Alex. Another technique used is the distance Kubrick puts between the viewer and the attack, there is an outstanding use of medium and long shots which removes the viewer from the violence to a certain degree. These two techniques combined create an illusion of there being two different Alex's, which means any negative response the viewer gains to 'Masked Alex' doesn't have an effect on the previously created alignment with the normal Alex.

Along with these points, the spectator is denied any POV from Alex, meaning yet again any negative response to Alex is diminished, and if there is any it is taken away with the mask. Alex also speaks to the spectator, saying "Viddywell, my brothers" just before the attack becomes a rape, this denies the spectator access to scenes of extreme violence that would make us un-align with Alex.
With all these aspects used at once, the spectator is taken completely out of the scene and any negative connotations are blocked or removed afterwards.