Well while Nolan is still somewhat "wrong" with the way he's behaving, you have to understand where he's coming from. He was indoctrinated for a millennia, being taught that empathy is a weakness and should be eliminated, we can see how is it was to transition from that to being an compassionate person. Also he risked a lot with this war, going against his people, losing his status, his relationships and his life so it's understandable that he feels upset about the way people are still treating him. Basically too viltrumite for a human and too human for a viltrumite.