In a fantasy world with monstrous races, human nature is far less of a broad term.

In the situation you describe, my character wouldn't bother going to look for food, since he already has a freshly slaughtered meal in front of him. Human nature hardly applies to those who aren't even mammals.

Also, never said he didn't care about the outcome, he'd just prioritize in a way that would be horrific to others. He might prefer to take the course of action that causes more civilian deaths, as it means more souls to fuel his magic.