Mass shootings

When I see some of the details of these mass school shootings I find it causes a large amount of turmoil. In all these cases they talk about all the kids who perpetrated the crime were bullied. A couple of the kids who were out of school and caused mass murder. I can't say and understand this by any stretch of my imagination.
If anyone would be able to understand it I would think it would be me. We moved around a lot in my school years after my mom died and I was 10. I lived with constant verbal abuse from my stepmother and some by my stepsister for years. I learned to just ignore them and consider the source. I was always small for my age, rather scrawny. To add to this I was mouthy which is a bad combination. I was the new kid a lot of years and became the subject of bullying in every school we attended. I moved to the city where we live now in the middle of 7th grade. There is one person in particular who verbally and physically bullied me until 11th grade. Some days he would tell me I should kill myself. Some days he told people I was homosexual which I'm not. Some days he would punch me in the back. No one ever stood up for me until 10th grade but he ignored them. Toward the end of 10th grade I became friends with Mark who became my best friend. In 11th grade I started hanging out in the group of people that Mark was friends with and the bullying stopped.
In all those years of being bullied and picked on not once did I think of settling it with a gun. I had access to a shotgun that my dad had. I was still 18 before I graduated I could've bought in a handgun or automaticb type rifle. I guess if anyone should understand these people who are bullied and semi-outcasts it would be me but I can't for the life of me understand. I can't say I really get it. If these people are this mentally ill why isn't their family stepping in. Your family can have you involuntarily committed if they need to. In all these cases there seems to be family involved that are either woefully ignorant or purposely ignorant. The Sandy Hook case just baffles me. His mother knew he had emotional problems and yet she owned guns and let him lose on society. I'm not saying all situations have negligent relatives but in a number of these cases it is true.
If the lure of military style weapons is that great then I would agree with banning them. I don't see that gun control would solve the problem though even though I wish it would.
Of course I never liked getting bullied. I never imagined shooting anyone. I had a "cancer list" of 3 people whose knees I would break with baseball bat if I ever got terminal cancer. One was the bully and the other 2 sucker punched me. One because I was mouthy and the other was a strange setup by an upper classman's lie about me. As I have grown up I have tended to forget about this and now that I have MS it really doesn't matter. Strangely I ended up working at the same place as 2 of the 3. I didn't have to work with them directly very often which was good because after all these years I find they are still jerks.