I agree in that Destro does seem to have a code when it comes to compassion for innocent, he doesn't want needless casualties if it can be swayed away from. That doesn't necessarily mean that he wouldn't shoot an innocent man if it was good for business. It really all comes back to greed and the all mighty dollar: Destro is all business. He's going to make that money the best way he knows how. He respects anyone who will put up an honorable fight or at least fight for what they beleive in but he's all about the money in the long run.