His wife Katy Perry is dressed as a cowgirl pointing a gun at him. That sends an obvious message to Brand's and Perry's impressionable young fans. It's the same message we've been telling people for 500 years: "Kill the Indian because he's a savage. The predatory beast 'whose known rule of warfare, is an undistinguished destruction of all ages, sexes and conditions,' is worthless and must die."
For more on the subject, see Tribalism Is Trendy and Rachel Zoe as an "Indian Warrior."