Well, the fact of the matter is that they're just... corpses. You're not seeing a character you like doing something evil because they're brainwashed/corrupted/pissed off/etc.; you're seeing the body of someone who is dead.
In my head, that's the same as a bunch of Amazo robots with decaying bodies copying one person's powers, and whatever the black rings do. There's no... "Oh no we must save our friends' souls!". It's just "Oh it's just a bunch of dead bodies. NUKE 'EM."