[He nods a little - "would not have allowed" he understands. Even so, his opinion on Elias quietly drops.* "Would" means very little if one can't enforce it, after all.]
Well... despair and hatred have power. Curses tend to persist, consequently. [That's what's enticing about them, when you're not the one affected.]
[*It should be noted that Ciel once got poisoned by humans, and this loser has not only could not prevent it; he also couldn't save Ciel but had to beg a human for help. So, you know.]