Did you ever attempt to engage in discussion people that self-identify as antifa online? Trust me, it is not a pleasant experience. My experiences so far were that they are full of mccarthyism accusing pretty much everyone of being a nazi, and that they want to silence (whether violently or via "cancelling") pretty much everyone who disagrees with them or defends someone who they do not like - even about the most mundane topic (as long as it is political/social). In addition if you check out antifa communities you will see that a lot of them engage in things like doxing and support arson of public property and buisnesses. Antifa is far from being just anti-fascist, even the original organisation, Antifaschistische Aktion was a Stalinist puppet.