because being wrong doesn't derive people from the ability to govern themselves? We should let them determine what is legal to say for the same reasons we should let them determine what is legal, period. Speech is not magical in any way.

>How much harder would it be to fight for civil rights if that was deemed subversive or abhorent, and subversive or abhorent speech was prohibited?

If the population already deemed civil rights abhorent I'm not exactly sure the legality of it matters a great deal tbh, it's not like a lot of civil rights protest was legal to begin with