If researched accurately then pretty much proves the point that if you are treated like shit, you tend to treat people like shit.
These people turn from victims to full-fledged monsters because we let them. If you are never really welcomed to join in on the fun, you will learn to do without it. And in time you will learn to have fun in your own special kinda way...
I think we all know this.
We just love calling people monsters and loonies because we don't like to admit that we helped to create them in the first place.