Free speech will always be in opposition to fascism. While fascism has been defined in the past by right-wing authoritarian control, I believe that fascist behaviors are bi-partisan and not specific to one type of ideology.
I think the issue is more of a personal one. The type of people who want to assert control over other people, these kinds of people are not specific to a certain partisanship, and threaten the freedom of speech. I think it's a problem of behavior. How these feelings manifest though, there are too many circumstances to tell. There is a part of human nature to succumb to group think and be cynical of opposing viewpoints due to cognitive dissonance and other psychological perspectives.
This is exactly it. Bang. Spot on. It's not a matter of Political idea it's a matter of behaviour. Realistically, everything is.