The monster inside him didn’t want to fly to Italy and treat with a vampire. It wanted to go to Italy and kill all the vampires. All of them everywhere. Then find Mercy, take her home, and barricade her in their home so that no one else could take her from them. Part of Adam’s trouble in bringing the wolf under control was that he pretty much felt the same way. Only his intellect could see how disastrous that might be. Still, his heart fought on the side of the monster.