Humanity in "Citizen Rex"

I chose this sequence from "Citizen Rex" because of the contrast of human and non-human faces that the artist uses; specifically, I enjoyed that how the individual's face is represented determines where the sympathies of the reader are placed. In the second chapter of Scott McCloud's "Understanding Comics," he spends a great deal of time talking about what people will identify as being a representation of a human face, and how detail, or lack thereof, can make the face of a character either more realistic or more iconic, respectively. Aside from the fact that the illustrations in "Rex" employ a beautifully minimalist style, conveying a more impressionistic feel, I was struck by how McCloud's words applied to the robots of the story; though obviously detached from the human form, they somehow seem just as lifelike as their organic counterparts. Even solely within the middle panel, one can observe the diversity of emotions expressed by the several robots present, feelings of frustration, contempt, and indifference. On the other had, note the lack of empathy or compassion conveyed by the Truth Takers in the top panel. Not only are their faces presented as dark, menacing, and unfeeling, but they are all in uniform amongst one another. There is no room for individual expression in their presentation, and as a result they become dehumanized, and are now just a force of opposition rather than anything that a reader could identify with. This irony does not seem lost on the artist, as the technique has been used in other contexts and mediums, such as the Storm Troopers from Star Wars. In a story that is so concerned about humanity, what it means to be human, and I found the depiction of the human face, and the effects of its variance, to be of particular interest. What do you believe this says about human nature, and out ability to read feelings and emotions into inanimate objects?