There's always going to be some line people are unwilling to cross. For instance, one might say Nazi rhetoric should be tolerated for its historical value, but I know zero advocates for allowing child porn.
But how about adult porn? Acceptable to some, not to others (also depends on the context - even advocates of adult videos are generally not arguing that YouTube should host them). And there are shades of that.
In the end, no matter how mature and accepting you are, unless you allow literally everything, you will need moderators who are empowered to be the final authority on that decision, which is what I mean by "dictatorship".
But how about adult porn? Acceptable to some, not to others (also depends on the context - even advocates of adult videos are generally not arguing that YouTube should host them). And there are shades of that.
In the end, no matter how mature and accepting you are, unless you allow literally everything, you will need moderators who are empowered to be the final authority on that decision, which is what I mean by "dictatorship".