"You got a gun. Now you can murder people".
I take that as a commentary on police brutality rather than a glorification of violence. In the real world, Police have murdered people in the past, so the game is pointing out that Girt now has a license (his badge and gun) to brutally punish citizens without fear of punishment from the state - like many Police Officers in America. So, to me, its a sarcastic piss-take on those Officers that think they can get away with murder now that they are a member of the force. To me, this dark joke is the opposite of glorification of violence.