From what I've read betheman, it's about 10%.
And I agree that some women want alpha sperm, and will find a beta to raise the child.
The association between this guy and "alpha" is what I have a problem with, as well as the ignorant assumption that because some deranged subset of women actually want to fuk this guy, there is some valuable lesson to be learned about "game" here.
There are probably far more women interested in nerds than there are that are interested in mass murderers. Obviously, nerds (or the women who love them) aren't sensationalized by the media - so you won't be reminded of that. Are even 10% of women interested in "nerds?" Maybe not. But even if it's only 5%, you'd be hard pressed to argue that even 1% actually find this type of extreme violence sexy. What women do generally find sexy are psychopathic traits (ruthlessness, fearlessness, carefree nonplanfulness, stress immunity, social potency, etc.) that are sublimated.
Listen, I fuked a woman on her honeymoon. I ran a train on a married b!tch on a boat once. I've fuked strippers. I've done all kinds of sh!t and I've seen some outrageous behavior from women - single, engaged, married.
I am far from naive as to many women's inability to control their impulses.
But I'm also smart enough to understand that the type of behavior these women are exhibiting, is atypical and far outside the bounds of normal - which means I shouldn't give a sh!t about it.
If you're honestly that desperate to get a woman that you idolize an indiscriminate mass murderer, be my guest. But as another poster explained, the sexual marketplace is a great big place, with room for all kinds of people. You don't have to be a psychopath to get laid, or - GASP - to find and actually keep a woman that adds value to your life.