Because he says things like:

..women have a subconscious wish for brutal male domination

..that it’s unfortunate that men can’t control women who say crazy things because they aren't allowed to hit them

..women who don’t want to be harassed at work but wear make up are being "hypocritical"

..young women are outraged because they don't have a baby to suckle

..if a woman doesn’t want to have kids, there's something wrong with her

..and says “The idea that women were oppressed throughout history is an appalling theory.” - despite women lacking basic human rights and legally being owned by men throughout history

..says stuff like “Men cannot oppose pathological women because chivalry demands they keep their most potent weapons sheathed” on twitter

Plus his associating women with chaos and men with order and clearly preferring order/male control to women/female freedom. His implications that society and culture should be dominated by masculine hierarchies and that femininity is destroying culture.

“[Society is] increasingly dominated by a view of masculinity that’s mostly characteristic of women who have terrible personality disorders and who are unable to have healthy relationships with men.”

“[That] terrible femininity…is undermining the masculine power of the culture in a way that’s, I think, fatal.”