$1:
Many on incel forums consider Marc Lepine — who, in 1989, killed 14 women and injured 10 other women at École Polytechnique in Montreal — the first incel killer.
Still, these attacks are often quickly deemed "lone wolf" attacks by authorities, and the public is told there's no threat to public safety.
Especially when their real name is Gamil Rodrigue Liass Gharbi.