Antifa, as it is today, are mainly SJWs and anarchists who attack anyone they perceive to be "fascist." The definition of fascist being so broad, it basically means anyone they perceive to be right wing. Ben Shapiro, Sargon of Akkad, Janice Fiamengo, random pro-life rallies, any group that supports limiting immigration, groups critical of Islam, groups that praise western culture, groups critical of feminism/BLM, etc--all fascists.
They're the intimidation arm of the radical left
Definition of terrorist:
"a person who uses unlawful violence and intimidation, especially against civilians, in the pursuit of political aims."
Please tell me how this definition doesn't 100% describe what Antifa does.