Bro G,
You are throwing softballs to the group and players are choosing to use badminton racquets to hit the balls. You are giving them many chances and they are choosing to be small rp and use violence to solve issues instead of other aspects of the game. Let them fall. Desperation on their part may cause inspiration (but likely more violence). Maybe they need to embrace the criminal culture of their deeds, be approached, reproached, recruited, and hunted for their actions?