Yes, because she killed him for his bad parenting and trying to kill her. You can imagine my complete lack of surprise when Calia instead references what a nice dude he was and how she liked listening to his sermons and Voss just bobs along and continues with her apology.
The part where after Nathanos dies Calia shows up so Bob can wax poetic about how wise and helpful she's been despite her having done literally nothing except passively lobotomize anyone who happens to be in her presence into being a peacenik is unintentional comedy though. On par with that beta quest text for the 8.3 Calia questline that has your character comment in his own head how Calia acted with honor.