Because in current year western society, a man's worth begins and ends with how desirable he is to women. An ugly, awkward man with no sexual market value is lower than shit to the majority of people.
The reason they're so obsessed with hating incels is the same reason most societies love shitting on their underclass. Most people are just monsters who want to hate. It doesn't matter who they hate, they just need to hate someone, and it needs to be socially acceptable because they are also cowards.
Because in current year western society, a man's worth begins and ends with how desirable he is to women. An ugly, awkward man with no sexual market value is lower than shit to the majority of people.