People often resort to violence because they're angry. People usually get angry because they felt some type of injustice occurred. For example, it's been reported that around half of the school shooters in the US were autistic. I read articles that said all of them were on antidepressants because they felt society rejected them because they were different. Since rejecting people because they're different is wrong and unjust and that's what they believed was occurring to them, they were angry about it and wanted justice. In their case, their anger was based on a misunderstanding. People were probably just uncomfortable or didn't like them because they weren't being themselves, had emotional problems, or took things the wrong way because of their negative thinking. I think it's common for autistic people to misinterpret other people's actions as rejection.
Quote:
I was so scared as a child if my routine changed, that is why I acted it violence
Acting violently to prevent something bad from happening sounds like self-defense which is another reason people resort to violence.
Quote:
I also was violent and aggressive if my routine changed when I was a young child.
Some people may think their parents are being unjust by changing their routine and making their life more difficult if they don't understand why their parents changed their routine. If that case, people may get violent to express their anger at the perceived injustice. They're communicating to their parents, "What you're doing (changing my routine) is wrong because you're making my life more difficult for no reason."