I wouldn't call it a complex. Just imagine yourself being picked upon by bullies, then you see someone that gets bullied... Natural reaction if you can do something about it is to do so. I've beaten up, ridiculed and/or threatened bullies with immense pain during most of my time in school, and it worked quite well. Had a couple of classmates a couple of scrawny guys, then there were some jocks that liked picking on them, had to do something about it or I wouldn't have been able to sleep at night knowing I could have done something. Really, after making a couple of examples (read bloody noses, hurting ribs and maybe a small concussion) people WILL listen, and after that all it took was some maintenance (threatening, some hurting ribs and maybe one bloody nose). And it kept them safe from the worst of it during five or six years until school was finished. I was picked on when I was little, and nothing will get me to hate somebody more than if they start doing bad stuff to the ones not bestowed with strength or agility.