We fought long and hard to get fandom’s existence legally and socially protected as a safe space for people (mostly women) to do whatever, be it explore fantasies they can’t act out in real life, deal with real life trauma, or just make shit up for fun.
There is a difference between a critique of fandom’s systemic problems with racism, misogyny and homophobia, and verbally attacking an individual person because you don’t like what they wrote. One is a valid discussion, the other is being an asshole.