There is a name for men who are mad that women won't fuck them, and it's called the "involuntary celibate".

The man accused of carrying out the Toronto van attack has alleged links to ‘involuntary celibate’ online communities. The language they use may be absurd, but the threat they pose could be deadly

Misogyny is a red flag for violence.

Alek Minassian, 25, a resident of Toronto’s Richmond Hill suburb, careened the white rental van onto a sidewalk, killing 10 people.