Isn't he supposed to have been on the autistic spectrum?
That would go a bit towards explaining why he felt he lacked the social skills of his peers, as well as his apparent lack of empathy and egocentricity (in the psychological - i.e. not meaning arrogant - sense)
Don't really follow the whole misogyny tangent, though. Ultimately any violence directed towards women is, almost by definition, a form or misogyny. It doesn't mean his primary motive was a hatred of women, though. Trying to link this to a broader feminist agenda is a bit of a stretch and typical of a certain regular poster in this forum.
There is no link between autism and violence against women.
There is no link between mental illness and violence against women.
There is a link between misogyny and violence against women.
We have a confession video and a 140 page manifesto in which he states that he wants to kill women for denying him sex, yet we can't say that this was his motive?
The actions he took were clearly a product of his deeply disturbed mental state, but he didn't lash out at bullies, he didn't lash out at old teachers, he didn't lash out at popular kids, he lashed out a women, something confirmed by his repeated statements that women were the cause of all of his problems.
I am not pushing an agenda here. I am merely trying to get people to recognise that misogyny played a part here. I may be wrong that misogyny was
the root cause, but was certainly one of the causes, and certainly played a large part in this crime, and was not merely some peripheral contributor, akin to violent video games and moves, as some people are suggesting.
As for the RedPill, MRA, PUA stuff, he did not fit into those communities because he was very defensive and came across as extremely narcissistic, but he still echoed many of their ideologies. His general narrative is "I'm a gentlemen, women should be sleeping with me", which is an extremely common tale in those circles (minus RedPill). He repeatedly mentions "obnoxious brutes/jocks", often talking about his physical inferiority to them. He talks about how they attract women, which is common RedPill alpha talk, and is basically their whole ethos. He even attempted to lift weights to become like them, but due to a lack of instant gratification, he gave up (instant gratification and giving up were also common themes). He talks about how women are manipulative and control access to sex, which echoes many of the posts made in those circles. I am not saying that they caused this violence, don't get me wrong. As much as I may disagree with much of what they say, I do not think that they're all mass-murderers waiting to happen. What I am saying is that there is a problem amongst young men, where misogyny is accepted and encouraged. They did not encourage his actions, but they certainly encouraged his beliefs.