This post was written in reaction to a guy going on a shooting spree at a sorority after being "snubbed" by them.
We (male) nerds grow up force-fed this script. Lusting after women "out of our league" was what we did. And those unattainable hot girls would always inevitably reject us because they didn't understand our intellectual interest in science fiction and comic books and would instead date asshole jocks. This was inevitable, and our only hope was to be unyieldingly persistent until we "earned" a chance with these women by "being there" for them until they saw the error of their ways. (The thought of just looking for women who shared our interests was a foreign one, since it took a while for the media to decide female geeks existed. The Big Bang Theory didn't add Amy and Bernadette to its main cast until Season 4, in 2010.)
This is, to put it mildly, a problematic attitude to grow up with. Fixating on a woman from afar and then refusing to give up when she acts like she's not interested is, generally, something that ends badly for everyone involved. But it's a narrative that nerds and nerd media kept repeating.
When this story broke, the initial mainstream coverage only talked about "mental illness," not misogyny, a line that people are now fervently exhorting us to stick to even after the manifesto's contents were revealed. Yet another high-profile tech CEO resignation ensued when the co-founder of Rap Genius decided Rodger's manifesto was a hilarious joke.
People found one of the girls Rodger was obsessed with and began questioning if her "bullying" may have somehow triggered his rage. And, worst of all, he has fan pages on Facebook that still haven't been taken down, filled with angry frustrated men singing his praises and seriously suggesting that the onus is on women to offer sex to men to keep them from going on rampages.