okay this is only my opinion. not meant to disparage any one person or group.
Ive thought about this alot over the years. and I have reached the tenative conclusion that the social engineering of the last thirty years is the cuase.
as more and more feel good laws were passed. such as banning corporal punishment in schools and basicaly at home. " due to fears of having you children taken becuase of accusations of abuse" there is a marked trend in Juvenile crime rises starting with in five years of the passage of such laws.
as more programs were added, such as banning anything considered to violent or disturbing or humiliating I.E. PE, dodgeball, cartoons. then there is the " you must not fight, ever no matter what... you must not get angry, you must not act like a child etc.."
Childeren were slowy pushed into a lack of social development, including the inability to deal with insults, gossip and being bullied. expecting to be protected by adults, they find that Adults are unable to protect and defend them in the hallways, classrooms, interenet or where ever.
lacking the cathartic release's that older generations have I truly believe some kids reach a point where they just snap. No one. meaning adults, can help them or even understand what they feel. so they dont bother to talk to Adults who failed them in the first place.
okay I might be blowing wind here. And maybe Im not expressing myself well. but there is no denying that earlier generations dealt with things in a much healthier way.
oh sure we fought, two of my best friends started off as my enemies, till we got into it and ended up respecting each other. we played jokes, and we dealt with insults and slurs. usually by tossing one right back.
no one thought a thing about the pocket knives we all carried, and every hunting season I had a rifle in my Truck in the school parking lot. it never occured to us to use those on others.
and as KIng of Axes pointed out.. Some are just born that way.