>>95939862Not all of the writers ever have been christian but the creators (Gygax and Arneson) were both Jehovah's Witnesses that eventually left the church but maintained their own Christian beliefs.
Which is what largely shaped D&D's ethics and philosophy.
Necromancy isn't strictly defined in the core books but it's generally treated as any spell involving death, the undead, and in most editions life.
Spells that banish the undead are still necromancy. There is no anti-necromancy there's necromancy that destroys undead and necromancy that creates undead.
https://forgottenrealms.fandom.com/wiki/Destroy_undead
>>95939892Healing and raising the dead is frequently necromancy, but it depends.
It was necromancy until WotC came along and changed it, healing to conjuration in 3rd and evocation in 5th. (4th didn't really do magic schools because of AEDU afaik)
Interestingly resurrection spells went from necromancy in TSR to conjuration in 3rd and back to necromancy in 5th.
Necromancy is explicitly magic dealing with death and anything that covers death must by necessity broach the topic of life. Bringing people back to life, whether correctly or not, is pitch perfect necromancy.
Raising the dead must be necromancy because it doesn't make sense as anything else. The one time it changed it didn't really make any sense.