Good faith and bad faith environment is about trust. When that trust break down you either find methods to regain trust or discourse becomes impossible.

So what strategies works most effective in restoring trust? We can learn by looking at the effective ways people have done in the past to create the opposite, increase distrust and conflict. Assuming bad faith based on race and class is very effective in creating environments of distrust, both on internet forums and elsewhere. Preemptively exercise power in unpredictable way, and enforce unclear rules in an inconsistent and nontransparent way also works wonder to further conflicts. Displaying symbols of ideological values and focus on tribal differences can effectively increase conflict over multiple generations.

You can not censor people into trust, and thus censorship is not a tool to create a good faith environment. You can remove people from the discourse until only people who belong to the same tribe is left, where every single participant trust the others because of psudo-kinship. Free speech, along with concepts like human rights and liberty, is however centered around common rules being enforced consistently in order to create trust among people who would otherwise be mistrusting of each other. You let the other side talk in order to create a common trust that they will let you talk.