I'm not really going to argue the moral nature of raising undead bodies on these boards, as it goes a little deep for a D&D game. In my games it's an evil act, and that's pretty much how it stands.
However, I will say that as I was reading the contrary responses I immediately started thinking the episodes of Constantine that I've seen recently (plus his backstory). John seemed to think what he did in summoning demons occasionally was necessary, but neither him nor any of his associates had any delusions that it was anything other than an evil act.