On Internet forums, especially if you're AC, "fascism" just means "zealousness". Like, "I hate the liberal fascists just as much as the conservative ones, and the Green Party fascists are the worst.".
No, what it means is that we have a troll here whose agenda is to tilt the entire exchange so that every political disposition is judged against the most strident example of the first-to-mind reductive cliche.
It's a war against subtlety. It's a war against moderates and it's a war against moderation—where "moderation" means the kind of people who think before speaking. It's a distributed, grassroots campaign to normalize the extremes through the implication that all stupidity is created equal. It's painting an f-washed world in which no person is angry or intense because they have a valid point to make about some aspect of society being not right. It's an exit ramp lowered to a swamp world where anger is a Halloween costume (Yoda, Darth Vader), rather than a tool (Martin Luther King, Jr).
That's what it means when 'fascism' becomes a trivialized wingnut stand-in for 'zealotry', a word which already has two boots firmly planted in labelling over listening. Add heels, click, and the world becomes corn-belt Kansas 24/7.