You don't justify this policy on whether someone got it a little wrong or a lot wrong or didn't think they were wrong at all.
You base and justify your policy on free speech grounds. You value free speech unless the speech would incite violence or otherwise endanger someone.
And I mean real violence, not the PC definition of someone frowning at you or saying something you don't like.
And the broader they define it into anything with which they disagree the less effective their tantrums become. Thankfully, most of them are too dumbed down and indoctrinated to understand this and so they continue to dig that hole to irrelevancy.