Looks like the subhumans are doing a good job of exterminating each other. I've never bought into the idea that "massive, bloody gang wars" are a bad thing. They just kill each other off making life safer for the good people.
If you include innocent bystanders like kids sitting at a bus stop in front of their middle school, or if you include the man who was shot standing in front of his home when a stray bullet struck him in the back and killed him, or if you include my neighbor who was shot in our driveway because a gangbanger was going through gang initiation, if you include people like all of them into your "subhuman" category then rest assured, your desire for "massive bloody gang wars" is being fulfilled.