You know, I can't point at an individual race that do this, but what comes to my mind are the movies that glorifies weapons and thuggery that come out of hollywood. I think they have some blame in this. There was no, Boys in the hood, South Central or menace to society when I was a kid. On that some note there was no Natural born killers, either. I Can't even count how many fist fights I had when I was a kid, but in this day and age, I would've been shot dead.
There were movies like Rocky and Jaws. Yes, they showed movies about Al Copone And Bank Robberies.. But no kids doing drive buys. If you have such a weak mind and are so much of a follower you have to join a gang and kill somebody just to prove you're hard, Walk up to man and fist fight. Not shoot his ass in the back, or a woman for that matter.
Just one mans opinion.