It's almost funny watching feminists going on about how they knew this and that after that incel attacked. Probkem is they tended to express their "knowledge" in the form of insults, attacks, generalizations, misrepresentations, and the occasional bold face lie.
II heard of involuntary celibate before... But I never heard of it's shorthand term "incel" before today... Despite reading alot of feminist blogs/sites/articles etc of the years.