This goes back to how we raise our kids and what we have allowed our society to become. We've all seen the kid throwing fit in the grocery store because he didn't get the candy he wanted, the parent either gives in or lets them get away with that behavior, instead of whipping that ass. Kids don't know how to loose gracefully anymore, and learn that to win, you need to do better next time. The best way to deal with a bully is a punch in the nose, now the kid who stands up for himself is considered just as bad or worse than the bully.
So whats so different now?
Our society! corporal punishment, discipline, Understanding that boys will be boys, Church, Respect for you parents, respect for authority in general, this barely exists anymore in our society. No now we celebrate stupidity, depravity, and any other morally bankrupt trend that comes along.
There is no mystery here, we create a small army of these little assholes, then wonder why this is happening?
We as a society have created this fucking mess, parents want to be their kids friend now