I've the same quirk. I studied World War II and the Holocaust for four years, and at one time, I thought perhaps I'd love to focus on it through further study. I left a comment on 51stCenturyFox's reaction post saying that the episode was "morbidly fascinating".

It was really like a punch to the solar plexus, this whole episode.

And I agree with certain parts of characterisation. Jack - for all that I loved him taking the mickey out of Rex - seems like he's having to force that sort of teasing.