As one dear to him is fond of saying 'Monsters are not born; they are made.' The blame falls to many, not just to one. Ignis might not agree with acting out when someone wrongs him, but he's not going to hold it against Dagger, especially if things are as bad as they sound like they may have been.

"My definition of 'deserved' has been in flux since a short time after I arrived on the island. We'll just leave that up in the air for now." Out of habit, he looks around them, though he certainly can't tell if the world seems any different for them starting to pick it apart, "Any change?"