Calling Dave back was a result of Julian's careful consideration. Just moments after agreeing to let those people join the guild, he suddenly realized a problem—no matter the form or purpose, in many people's eyes, a guild like this would be seen as a gang. As Graf had once put it, this was a gang, not just a community organization with a different agenda. It was a gang.
Julian didn't oppose this idea, but he didn't fully support it either. Where the sun doesn't shine, shadows inevitably exist. However, he didn't want a future where the first thing people associated with his name was the title of a gang leader. It wasn't that he looked down on such a role; rather, he needed more "business cards" and wanted to minimize negative associations as much as possible. Thus, light and darkness needed to be separated from the chaos and held in each of his hands.
One hand for light.
One hand for darkness.