It made sense. Dutch recruited followers, and when you’re an outlaw gang more or less just trying to survive, you’re not going to be picky about race or gender. And when you’re a desperate on-your-own looking to join this small traveling community of accidentally diverse people, you don’t build prejudices that you might have if you already had a community of your own. They wouldn’t have had it ingrained enough to overcome the desire to join a group, and any prejudice they may already have would be whittled away by actually interacting with the people they’re supposed to hate.