The two main things to consider when using necromancers are: Where do their abilities come from? and What do they do?

Where do their abilities come from?
>Almost all sources agree that necromancy is a form of magic. The main question to consider at this point is whether the magic necromancers use is divine or arcane.
>>Divine magic is magic given to an individual by a divine entity. This would count as a form of [divine intervention], so if you go this route, you need to make sure you are consistent with the existence of divine magic (i.e. there would be others with divine magic as well, not just necromancers, unless there is only one divine entity, and that entity only wants to help necromancers).
>>>If this is the case, does this mean all necromancers are acolytes or priests/priestesses? Does the divine entity give the use of this magic to people that don’t worship them, or only to devote followers?
>>Arcane magic is pretty much any magic that is not bestowed by a divine entity.
>Is necromantic ability inheritable?
>>If it is, is it only inheritable from another necromancer, or can anyone who has inherited magic use it?

Necromancers, by definition, control the dead. However, there are multiple ways to do this. The two main categories would be animating the dead, and creating undead/living dead.
>Animating the dead: This would create corpses that could move, but not think. The dead created in this manner would be easily outsmarted, unless the necromancer was present. If the necromancer was present, the necromancer would be able to force the animated dead to move in a tactically sound manner. This is the type of zombie that would be able to be outsmarted by entering a building and then leaving through a different door while it could not see you. On the other hand, this type would not be able to feel, or be deterred, by pain, as it’s just a hunk of rotting meat that happens to be moving.
>Creating undead/living dead: This would involve the necromancer taking something that was dead and then making it not dead. Depending on the necromancer, these may or may not be under the necromancer’s control. They will likely be limited by the same restraints as when they were alive, however, because they’ve already died, the threat of death may not deter them.

How does the general population feel about necromancers as opposed to other magic users?

How do other magic users feel about necromancers?

How do necromancers feel about non-necromancer magic users?

Are necromancers inherently evil or are they just people with an interest in death and beyond?

Can people tell a necromancer from a non-necromancing magic user?