I think that's a natural reaction to feeling loads of guilt over doing something horrible. And fwiw, I see Padma engaging in the same sort of behavior here. Not that Dean deserved it, or that she isn't being thoroughly self-centered here, but I think accusing her of being a sociopath is too much.

Think about how much people try to shift blame around over other types of accidents, or really any calamity that is not caused by an act of nature. The tendency to blame the victim is totally a part of human defense mechanism, whether or not it's a justified reaction.