Gender-based harassment, always intersectional, is marked by the intent of the harasser to denigrate women on the basis of their sex, race, religion, gender, sexual identities or disabilities. It frequently uses violence that leverages existing real world threats that women navigate, like avoiding rape or intimate partner violence.
The current decline in civil discourse comes from many quarters. People decry the lack of common courtesy in debates large and small. I maintain that anonymity on the Web is one factor in this decline, and if everyone with an opinion to share had to back up that opinion with a signature, there might be more restraint.