I don't get it. You're saying that because they're created by soulfire that they are soulfire. So saying that somebody's created by Magic so they're Magic. Harry says he uses his magic. So I just don't get the rational. I don't think they mean it's like I made it out of clay so it's Clay. I think you're looking too much into it. They got reanimated. Not totally unlike necromancy but I think in this case their get created using the soul not just the absence of