Noah, a middle-aged man, makes a passive comment on social media about his colleague. He would not make such a comment in a face-to-face conversation with the colleague. According to Milgram's study, Noah most likely made the comment about his colleague because of .

Depersonalization of the colleague    

Explanation:

According to the concept of Milgram, depersonalization of a person is the mechanism in which a person's feeling,characteristic or thoughts seems to be unreal.They tend to lose identity sense of their own or others.

According to the question's scenario, Noah's comment on his colleague on social media is depicting depersonalization of colleague done by Noah.He lost his sense to identify his colleague on social media as he would never make such comment in real life on him.

paul revere would be your answer : )