what was wrong with that person who when on killing spree in californa, usa?

So many things wrong with some of these answers.

@OneDrop - being "sexually frustrated" DOES IN NO WAY give a man the right to lash out and target a woman. If a guy doesn't like me, do I go kill him? No. This is predominantly a "male thing" because men think they are superior and don't understand that women are not their little play dolls.

@Stargazer - no, we don't need "call girls." According to your answer, somehow this situation is still women's fault, because we don't have women to just give guys pleasure to "not be frustrated." The purpose of a woman is not to pleasure a man, so you're answer is completely invalid and offensive.

What was wrong with the killer? Well, he had mental issues and he was extremely misogynistic, considering he wrote a 140 page manifesto proclaiming his hatred of women because he couldn't get laid. However, the only difference between the killer and the majority of men in this country, was the fact that he was mentally ill.

The answer can't be simple, so we'll never know. People are content to simplify, as indicated by many if the posts here. Many consider attempts to understand this man as means of justifying ones own agenda. For example, as another attempt to ban guns. You will hear this over and over. People don't care and don't want to know what happened to this young man, not even to protect people from becoming victims of such violence in the future. It's vwey sad.

Everyone has something wrong with them, some show it more than others.

This is why there is a need for callgirls so that people like this can get some sex and not be frustrated.

So he was turned down by girls and so went out to kill them, but if this applied to all men who get turned down there would be no females left.

He was sexually frustrated and a bit crackers

Lol