yknow , I agree with your broad points -- I even agree with the sarcastic tone you used to convey the line, but the families of those murdered or injured by Ted Kaczynski would probably prefer the title murderer/arsonist/terrorist.. even inmate.
Most folks would probably prefer that the most infamous title be used when speaking about those that society has deemed to be of ill repute.
'Spiritualist Genghis Khan' sounds weird. So does 'music aficionado and critic Charles Manson'.
It's a grim take, but the condemnation offered by the legal process is one of the things that helps the victims of a crime cope. In other words, the social branding of 'murderer' or 'convict' onto the person charged with the crime is also part of the justice offered to the victims via the legal system -- to ignore that the social title and distinction of the person has been affected by their transition to 'convict' status is to ignore a facet of what the prosecution was attempting to achieve for the sake of the victims.